Fmoc-Gln-OH | Fmoc-L-glutamine | Carboxylic Acids

Structure of Fmoc-Gln-OH
CAS No.: 71989-20-3

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Synonyms: Fmoc-L-glutamine

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Quality Control of [ 71989-20-3 ] Purity: 97% SDS Specification

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Product Details of [ 71989-20-3 ]

CAS No. :	71989-20-3
Formula :	C₂₀H₂₀N₂O₅
M.W :	368.38
SMILES Code :	O=C(O)[C@@H](NC(OCC1C2=C(C3=C1C=CC=C3)C=CC=C2)=O)CCC(N)=O
Synonyms :	Fmoc-L-glutamine
MDL No. :	MFCD00037137
InChI Key :	IZKGGDFLLNVXNZ-KRWDZBQOSA-N
Pubchem ID :	2724775

Safety of [ 71989-20-3 ]

GHS Pictogram:
Signal Word:	Warning
Hazard Statements:	H315-H319-H335
Precautionary Statements:	P261-P305+P351+P338

Computational Chemistry of [ 71989-20-3 ] Show Less

Physicochemical Properties

Num. heavy atoms	27
Num. arom. heavy atoms	12
Fraction Csp3	0.25
Num. rotatable bonds	9
Num. H-bond acceptors	5.0
Num. H-bond donors	3.0
Molar Refractivity	97.69
TPSA ? Topological Polar Surface Area: Calculated from Ertl P. et al. 2000 J. Med. Chem.	118.72 Å²

Lipophilicity

Log P_o/w (iLOGP)? iLOGP: in-house physics-based method implemented from Daina A et al. 2014 J. Chem. Inf. Model.	1.87
Log P_o/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry	1.89
Log P_o/w (WLOGP)? WLOGP: Atomistic method implemented from Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.	2.24
Log P_o/w (MLOGP)? MLOGP: Topological method implemented from Moriguchi I. et al. 1992 Chem. Pharm. Bull. Moriguchi I. et al. 1994 Chem. Pharm. Bull. Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.	1.5
Log P_o/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com	2.04
Consensus Log P_o/w? Consensus Log P_o/w: Average of all five predictions	1.91

Water Solubility

Log S (ESOL):? ESOL: Topological method implemented from Delaney JS. 2004 J. Chem. Inf. Model.	-3.05
Solubility	0.329 mg/ml ; 0.000892 mol/l
Class? Solubility class: Log S scale Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly	Soluble
Log S (Ali)? Ali: Topological method implemented from Ali J. et al. 2012 J. Chem. Inf. Model.	-4.01
Solubility	0.0364 mg/ml ; 0.0000987 mol/l
Class? Solubility class: Log S scale Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly	Moderately soluble
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com	-4.87
Solubility	0.00496 mg/ml ; 0.0000135 mol/l
Class? Solubility class: Log S scale Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly	Moderately soluble

Pharmacokinetics

GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg	High
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg	No
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) and tested on 415 molecules (test set) 10-fold CV: ACC=0.72 / AUC=0.77 External: ACC=0.88 / AUC=0.94	Yes
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) and tested on 3000 molecules (test set) 10-fold CV: ACC=0.83 / AUC=0.90 External: ACC=0.84 / AUC=0.91	No
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) and tested on 3000 molecules (test set) 10-fold CV: ACC=0.80 / AUC=0.86 External: ACC=0.80 / AUC=0.87	No
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) and tested on 2075 molecules (test set) 10-fold CV: ACC=0.78 / AUC=0.85 External: ACC=0.71 / AUC=0.81	No
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) and tested on 1068 molecules (test set) 10-fold CV: ACC=0.79 / AUC=0.85 External: ACC=0.81 / AUC=0.87	No
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) and tested on 2579 molecules (test set) 10-fold CV: ACC=0.77 / AUC=0.85 External: ACC=0.78 / AUC=0.86	No
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from Potts RO and Guy RH. 1992 Pharm. Res.	-7.21 cm/s

Druglikeness

Lipinski? Lipinski (Pfizer) filter: implemented from Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev. MW ≤ 500 MLOGP ≤ 4.15 N or O ≤ 10 NH or OH ≤ 5	0.0
Ghose? Ghose filter: implemented from Ghose AK. et al. 1999 J. Comb. Chem. 160 ≤ MW ≤ 480 -0.4 ≤ WLOGP ≤ 5.6 40 ≤ MR ≤ 130 20 ≤ atoms ≤ 70	None
Veber? Veber (GSK) filter: implemented from Veber DF. et al. 2002 J. Med. Chem. Rotatable bonds ≤ 10 TPSA ≤ 140	0.0
Egan? Egan (Pharmacia) filter: implemented from Egan WJ. et al. 2000 J. Med. Chem. WLOGP ≤ 5.88 TPSA ≤ 131.6	0.0
Muegge? Muegge (Bayer) filter: implemented from Muegge I. et al. 2001 J. Med. Chem. 200 ≤ MW ≤ 600 -2 ≤ XLOGP ≤ 5 TPSA ≤ 150 Num. rings ≤ 7 Num. carbon > 4 Num. heteroatoms > 1 Num. rotatable bonds ≤ 15 H-bond acc. ≤ 10 H-bond don. ≤ 5	0.0
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat implemented from Martin YC. 2005 J. Med. Chem.	0.56

Medicinal Chemistry

PAINS? Pan Assay Interference Structures: implemented from Baell JB. & Holloway GA. 2010 J. Med. Chem.	0.0 alert
Brenk? Structural Alert: implemented from Brenk R. et al. 2008 ChemMedChem	0.0 alert: heavy_metal
Leadlikeness? Leadlikeness: implemented from Teague SJ. 1999 Angew. Chem. Int. Ed. 250 ≤ MW ≤ 350 XLOGP ≤ 3.5 Num. rotatable bonds ≤ 7	No; 1 violation:MW<2.0
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties, trained on 12'782'590 molecules and tested on 40 external molecules (r² = 0.94)	3.84

Application In Synthesis of [ 71989-20-3 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

Downstream synthetic route of [ 71989-20-3 ]

[ 71989-20-3 ] Synthesis Path-Downstream 1~33

1
[ 71989-20-3 ]
[ 161420-87-7 ]

Yield	Reaction Conditions	Operation in experiment
86.5%	With [bis(acetoxy)iodo]benzene; In water; ethyl acetate; acetonitrile; at 20 - 30℃; for 72h;	A. The suspension 100g271 . 5nmolFmoc-Gln-OH with 2L ethyl acetate: acetonitrile: water = 2:1: mixed solution 1(v/v/v), in 20-30 C add 105.1g325 . 9nmolDipa, reaction 72 hours, post-processed to obtain product Fmoc-Dab-OH80g. Yield of 86.5%, HPLC: 99.6%. The infrared, nuclear magnetic resonance confirmed correct structure, see Figure 1, Figure 2.

References: [1]Bulletin of the Chemical Society of Japan,2004,vol. 77,p. 1915 - 1924.
[2]Patent: CN105348147,2016,A .Location in patent: Paragraph 0014.
[3]Synlett,2011,p. 1917 - 1919.
[4]Journal of Peptide Science,2017,vol. 23,p. 202 - 214.
[5]Angewandte Chemie - International Edition,2017,vol. 56,p. 524 - 529.
Angew. Chem.,2017,vol. 129,p. 539 - 544,6.
[6]European Journal of Medicinal Chemistry,1995,vol. 30,p. 115 - 122.

2
[ 122889-11-6 ]
[ 35737-15-6 ]
[ 35661-38-2 ]
[ 71989-20-3 ]
Cbz-His-OH [ No CAS ]
[(R)-1-((R)-1-{(R)-2-Benzyloxy-1-[(R)-1-((S)-1-carbamoyl-ethylcarbamoyl)-2-(1H-indol-3-yl)-ethylcarbamoyl]-ethylcarbamoyl}-3-carbamoyl-propylcarbamoyl)-2-(1H-imidazol-4-yl)-ethyl]-carbamic acid benzyl ester [ No CAS ]

References: [1]Journal of Medicinal Chemistry,1997,vol. 40,p. 192 - 200.

3
[ 6214-20-6 ]
[ 108-24-7 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 77128-73-5 ]
Fmoc-Val [ No CAS ]
Ac-Val-NMeGln-Ser-NMePhe-NH₂ [ No CAS ]

References: [1]Journal of Medicinal Chemistry,2000,vol. 43,p. 103 - 113.

4
[ 29022-11-5 ]
[ 35661-40-6 ]
[ 108-24-7 ]
[ 71989-20-3 ]
[ 198561-07-8 ]
Ac-Gln-Asp-Phe-Gly-OH [ No CAS ]

References: [1]Organic Letters,2007,vol. 9,p. 2469 - 2472.

5
[ 71989-20-3 ]
Fmoc-Ala [ No CAS ]
[ 125238-99-5 ]

References: [1]Bulletin of the Chemical Society of Japan,2004,vol. 77,p. 1915 - 1924.

6
C₁₀H₁₅N₂O₅Pol [ No CAS ]
[ 29022-11-5 ]
[ 68858-20-8 ]
[ 35661-60-0 ]
[ 71989-31-6 ]
[ 35661-40-6 ]
[ 71989-33-8 ]
[ 71989-14-5 ]
[ 71989-23-6 ]
[ 71989-38-3 ]
[ 71989-26-9 ]
[ 71989-35-0 ]
[ 35661-38-2 ]
[ 71989-28-1 ]
[ 71989-16-7 ]
[ 71989-20-3 ]
[ 104091-08-9 ]
[ 143824-78-6 ]
C₄₂H₅₂N₇O₁₄Pol [ No CAS ]
C₄₄H₅₆N₇O₁₄Pol [ No CAS ]
C₄₅H₅₈N₇O₁₄Pol [ No CAS ]
C₄₅H₅₆N₇O₁₄Pol [ No CAS ]
C₄₆H₆₀N₇O₁₄Pol [ No CAS ]
C₄₅H₅₈N₇O₁₄PolS [ No CAS ]
C₄₆H₆₀N₇O₁₄Pol [ No CAS ]
C₄₈H₆₄N₇O₁₄Pol [ No CAS ]
C₄₇H₆₂N₇O₁₅Pol [ No CAS ]
C₄₇H₆₂N₇O₁₄PolS [ No CAS ]
C₄₇H₆₀N₇O₁₄Pol [ No CAS ]
C₄₈H₆₄N₇O₁₄Pol [ No CAS ]
C₄₉H₆₆N₇O₁₅Pol [ No CAS ]
C₄₈H₆₄N₇O₁₅Pol [ No CAS ]
C₄₉H₅₈N₇O₁₄Pol [ No CAS ]
C₅₁H₆₂N₇O₁₄Pol [ No CAS ]
C₅₀H₆₈N₇O₁₅Pol [ No CAS ]
C₄₅H₅₇N₈O₁₅Pol [ No CAS ]
C₄₇H₆₁N₈O₁₅Pol [ No CAS ]
C₄₉H₆₄N₇O₁₆Pol [ No CAS ]
C₅₃H₆₆N₇O₁₅Pol [ No CAS ]
C₅₁H₆₈N₇O₁₆Pol [ No CAS ]
C₅₁H₆₉N₈O₁₆Pol [ No CAS ]
C₅₃H₇₃N₈O₁₆Pol [ No CAS ]
C₅₆H₆₇N₈O₁₆Pol [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
	With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine; In DMF (N,N-dimethyl-formamide); at 20℃; for 12h;Combinatorial reaction / High throughput screening (HTS);	Split & Mix Procedure for the Resin Bound HexapeptideP-Glu (OAll)-Gly-X1X2X3X4-H sublibrary The resin was suspended in 3:1 mixture of 1,2-dichloroethane (DCE) and DMF and equally partitioned into 17 4 mL Alltech tubes. Each tube thus contained 0.1/17 mmol=5.88 10-6 mol of resin-bound dipeptide. Excess solvent was removed in vacuo, and the resin was suspended in DMF (200 mL) and agitated for 30 minutes. The 17 amino acids (1.76 10-5 mmol, 3 eq for each step, 7.04 10-5 mmol for 4 steps) were weighed into 17 vials: 1. Fmoc-Ala-OH 22 mg 2. Fmoc-Asn-OH 25 mg 3. Fmoc-Asp(OtBu)-OH 29 mg 4. Fmoc-Gln-OH 26 mg 5. <strong>[104091-08-9]Fmoc-Glu(OtBu)-OH</strong> 30 mg 6. Fmoc-Gly-OH 21 mg 7. Fmoc-Ile-OH 25 mg 8. Fmoc-Leu-OH 25 mg 9. Fmoc-Lys(BOC)-OH 33 mg 10. Fmoc-Met-OH 26 mg 11. Fmoc-Phe-OH 27 mg 12. Fmoc-Pro-OH 24 mg 13. Fmoc-Ser(tBu)-OH 27 mg 14. Fmoc-Thr(tBu)-OH 28 mg 15. Fmoc-Trp(BOC)-OH 37 mg 16. Fmoc-Tyr(tBu)-OH 32 mg 17. Fmoc-Val-OH 24 mg Each amino acid was dissolved in DMF (2 mL); an aliquot of each solution (0.5 mL, corresponding to 1.76 10-5 mmol, 3 eq of each amino acid) was added to the appropriate tube. TBTU (1.76 10-5 mmol×17=2.99 10-4, 96 mg) and DIPEA (1.76 10-5 mmol×17=2.99 10-4, 52 mL) were separately dissolved in DMF (1.7 mL) and each solution was evenly distributed, delivering 3 eq of each reagent, to each one of the 17 tubes.The reaction tubes were agitated at room temperature for 12 hours, then the reagents and solvents were removed in vacuo and the resin was rinsed with DMF (2×1 mL each tube), DCM (2×1 mL each tube) and methanol (2×1 mL each tube). The resin was then suspended in 3:1 mixture of 1,2-dichloroethane and DMF and recombined. The recombined resin was acetylated (3 mL of acetylating reagent, 1 hour, room temperature) and deprotected (3 mL of 20% piperidine in DMF, 2 hours, room temperature).The procedure was repeated 3 more times. At the end of the 4th amino acid coupling the deprotection step was not executed.

References: [1]Patent: US6909006,2005,B1 .Location in patent: Page/Page column 30-31; 37.

7
[ 159610-89-6 ]
Nα-Fmoc-Arg(NG-pbf)-Rink amide resin [ No CAS ]
[ 29022-11-5 ]
[ 35661-60-0 ]
[ 108-24-7 ]
[ 71989-23-6 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 75932-02-4 ]
[ 198561-07-8 ]
[ 1217266-32-4 ]

References: [1]European Journal of Organic Chemistry,2010,p. 446 - 457.

8
Nα-Fmoc-Arg(NG-pbf)-Rink amide resin [ No CAS ]
[ 1097192-04-5 ]
[ 29022-11-5 ]
[ 35661-60-0 ]
[ 108-24-7 ]
[ 71989-23-6 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 75932-02-4 ]
[ 198561-07-8 ]
[ 1217266-30-2 ]

References: [1]European Journal of Organic Chemistry,2010,p. 446 - 457.

9
Nα-Fmoc-Arg(NG-pbf)-Rink amide resin [ No CAS ]
[ 1097192-04-5 ]
[ 29022-11-5 ]
[ 35661-60-0 ]
[ 108-24-7 ]
[ 71989-23-6 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 75932-02-4 ]
[ 198561-07-8 ]
[ 1217266-28-8 ]

References: [1]European Journal of Organic Chemistry,2010,p. 446 - 457.

10
[ 29022-11-5 ]
[ 68858-20-8 ]
[ 35661-60-0 ]
[ 35661-39-3 ]
[ 112883-29-1 ]
[ 35661-40-6 ]
[ 136083-57-3 ]
[ 104091-09-0 ]
[ 71989-23-6 ]
[ 35737-15-6 ]
[ 73731-37-0 ]
[ 71989-16-7 ]
[ 105047-45-8 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 91000-69-0 ]
[ 96402-49-2 ]
[ 94744-50-0 ]
Y-(α-aminoisobutyroyl)-EGTFTSDYSIYLDKKAQRAFVNWLLA-(α-aminoisobutyroyl)-KYG-(β-(1-naphthyl)-alaninoyl)-LDF-NH2 [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
		Solid phase peptide synthesis was performed on a CEM Liberty Peptide Synthesizer using standard Fmoc chemistry. TentaGel S Ram resin (1 g; 0.25 mmol/g) was swelled in NMP (10 ml) prior to use and transferred between tube and reaction vessel using DCM and NMP. Coupling (0148) An Fmoc-amino acid in NMP/DMF/DCM (1:1:1; 0.2 M; 5 ml) was added to the resin in a CEM Discover microwave unit together with HATU/DMF or COMU/DMF (0.5 M; 2 ml) and DIPEA/NMP (2.0 M; 1 ml). The coupling mixture was heated to 75° C. for 5 min while nitrogen was bubbled through the mixture. The resin was then washed with NMP (4×10 ml). Deprotection (0149) Piperidine/DMF (20percent; 10 ml) was added to the resin for initial deprotection and the mixture was heated by microwaves (30 sec; 40° C.). The reaction vessel was drained and a second portion of piperidine/NMP (20percent; 10 ml) was added and heated (75° C.; 3 min.) again. The resin was then washed with DMF (6×10 ml). Side Chain Acylation (0150) Fmoc-Lys(ivDde)-OH or alternatively another amino acid with an orthogonal side chain protective group was introduced at the position of the acylation. The N-terminal of the peptide backbone was then Boc-protected using Boc2O or alternatively by using a Boc-protected amino acid in the last coupling. While the peptide was still attached to the resin, the orthogonal side chain protective group was selectively cleaved using freshly prepared hydrazine hydrate (2-4percent) in NMP for 2×15 min. The unprotected lysine side chain was first coupled with Fmoc-Glu-OtBu or another spacer amino acid, which was deprotected with piperidine and acylated with a lipophilic moiety using the peptide coupling methodology as described above. Alternatively, the acylation moiety was introduced as a premade building block e.g. Fmoc-Lys(hexadecanoyl-gamma-Glu)-OH where gamm-Glu is the coupling of Glutamic acid through the side-chain. Abbreviations employed are as follows: COMU: 1-[(1-(cyano-2-ethoxy-2-oxoethylideneaminooxy)-dimethylamino-morpholinomethylene)]methanaminium hexaflourophosphate ivDde: 1-(4,4-dimethyl-2,6-dioxocyclohexylidene)3-methyl-butyl Dde: 1-(4,4-dimethyl-2,6-dioxocyclohexylidene)-ethyl DCM: dichloromethane DMF: N,N-dimethylformamide (0151) DIPEA: diisopropylethylamine EtOH: ethanol Et2O: diethyl ether HATU: N-[(dimethylamino)-1H-1,2,3-triazol[4,5-b]pyridine-1-ylmethylene]-N-methylmethanaminium hexafluorophosphate N-oxide MeCN: acetonitrile NMP: N-methylpyrrolidone (0152) TFA: trifluoroacetic acid TIS: triisopropylsilane Cleavage (0153) The resin was washed with EtOH (3×10 ml) and Et2O (3×10 ml) and dried to constant weight at room temperature (r.t.). The crude peptide was cleaved from the resin by treatment with TFA/TIS/water (95/2.5/2.5; 40 ml, 2 h; r.t.). Most of the TFA was removed at reduced pressure and the crude peptide was precipitated and washed three times with diethylether and dried to constant weight at room temperature. HPLC Purification of the Crude Peptide (0154) The crude peptide was purified to greater than 90percent by preparative reverse phase HPLC using a PerSeptive Biosystems VISION Workstation equipped with a C-18 column (5 cm; 10 mum) and a fraction collector and run at 35 ml/min with a gradient of buffer A (0.1percent TFA, aq.) and buffer B (0.1percent TFA, 90percent MeCN, aq.). Fractions were analyzed by analytical HPLC and MS and relevant fractions were pooled and lyophilized. The final product was characterized by HPLC and MS. (0155) The synthesized compounds are shown in Table 1 and Table 2

References: [1]Patent: US2015/299281,2015,A1 .Location in patent: Paragraph 0147-0155.

11
[ 29022-11-5 ]
[ 68858-20-8 ]
[ 35661-60-0 ]
[ 35661-39-3 ]
[ 112883-29-1 ]
[ 35661-40-6 ]
[ 136083-57-3 ]
[ 104091-09-0 ]
[ 71989-23-6 ]
[ 35737-15-6 ]
[ 73731-37-0 ]
[ 105047-45-8 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 77128-73-5 ]
[ 91000-69-0 ]
[ 116611-64-4 ]
C₁₅₀H₂₂₈N₄₀O₄₅ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
		General procedure: tGLP-1 and its analogues 2?13 were all synthesized using general solid-phase peptide synthesis of N-Fmoc/tBu chemistry. 63Fmoc Rink Amide-MBHA resin (0.1 mmol) was added to a 25 ml peptide synthetic vessel and swollen with DMF for 40 min. After deprotected by 25percent piperidine in DMF, a solution of Fmoc-AA-OH (0.4 mmol), HATU (0.4 mmol), HoAt (0.4 mmol) and DIPEA (0.8 mmol) in DMF was added to the vessel. After reacted for 1 h, the resin was washed three times with DMF and three times with CH2Cl2, then qualitative ninhydrin testing was performed to monitor whether some free amino groups still existed on the resin ornot. If not, the resin was washed three times with DMF again and repeated the procedures of deprotection and coupling. Forthe coupling of some unnatural amino acids, NMM instead of DIPEA and NMP instead of DMF were used. Besides, the reaction time was prolonged to 4 h. Following the final deprotection of N-terminus, the target peptide was cleaved from resin with Reagent K (TFA/thioanisole/water/phenol/EDT, 82.5:5:5:5:2.5) for 2 h atroom temperature. After filtration, the residue solution was concentrated, precipitated with cold diethyl ether and centrifuged for three times. The residue was dissolved in water and purified by Waters 2545 preparative RP-HPLC system. Sephadex G-25 was used for the further purification to remove some short peptide impurities. The molecular mass of the target peptide was confirmed by MALDI-TOF. The purity of peptide was tested with analytical RP-HPLC, and the conditions were as follows: a linear gradient of 20percent mobile phase A and 80percent mobile phase B to 80percent mobile phase A and 20percent mobile phase B (A: acetonitrile containing 0.1percent TFA; B: H2O containing 0.1percent TFA) in 30 min, at a flow rate of 1 mL/minute with UV detection at 214 nm.

References: [1]Bioorganic and Medicinal Chemistry,2016,vol. 24,p. 1163 - 1170.

12
[ 29022-11-5 ]
[ 68858-20-8 ]
[ 35661-60-0 ]
[ 35661-39-3 ]
[ 112883-29-1 ]
[ 35661-40-6 ]
[ 136083-57-3 ]
[ 71989-23-6 ]
[ 35737-15-6 ]
[ 73731-37-0 ]
[ 105047-45-8 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 91000-69-0 ]
[ 116611-64-4 ]
[ 193954-26-6 ]
C₁₅₀H₂₂₈N₄₀O₄₅ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
		General procedure: tGLP-1 and its analogues 2-13 were all synthesized using general solid-phase peptide synthesis of N-Fmoc/tBu chemistry. 63Fmoc Rink Amide-MBHA resin (0.1 mmol) was added to a 25 ml peptide synthetic vessel and swollen with DMF for 40 min. After deprotected by 25% piperidine in DMF, a solution of Fmoc-AA-OH (0.4 mmol), HATU (0.4 mmol), HoAt (0.4 mmol) and DIPEA (0.8 mmol) in DMF was added to the vessel. After reacted for 1 h, the resin was washed three times with DMF and three times with CH2Cl2, then qualitative ninhydrin testing was performed to monitor whether some free amino groups still existed on the resin ornot. If not, the resin was washed three times with DMF again and repeated the procedures of deprotection and coupling. Forthe coupling of some unnatural amino acids, NMM instead of DIPEA and NMP instead of DMF were used. Besides, the reaction time was prolonged to 4 h. Following the final deprotection of N-terminus, the target peptide was cleaved from resin with Reagent K (TFA/thioanisole/water/phenol/EDT, 82.5:5:5:5:2.5) for 2 h atroom temperature. After filtration, the residue solution was concentrated, precipitated with cold diethyl ether and centrifuged for three times. The residue was dissolved in water and purified by Waters 2545 preparative RP-HPLC system. Sephadex G-25 was used for the further purification to remove some short peptide impurities. The molecular mass of the target peptide was confirmed by MALDI-TOF. The purity of peptide was tested with analytical RP-HPLC, and the conditions were as follows: a linear gradient of 20% mobile phase A and 80% mobile phase B to 80% mobile phase A and 20% mobile phase B (A: acetonitrile containing 0.1% TFA; B: H2O containing 0.1% TFA) in 30 min, at a flow rate of 1 mL/minute with UV detection at 214 nm.

References: [1]Bioorganic and Medicinal Chemistry,2016,vol. 24,p. 1163 - 1170.

13
[ 35661-39-3 ]
[ 112883-29-1 ]
[ 71989-31-6 ]
[ 105047-45-8 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 91000-69-0 ]
[ 135248-89-4 ]
[ 71989-31-6 ]
[ 116611-64-4 ]
[ 161420-87-7 ]
C₈₄H₁₁₈N₂₄O₂₁S₂ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
		Coupling of the First Protected Amino Acid Residue to the Resin 0.5 g of 2-chlorotritylchloride resin (100-200 mesh, copoly(styrene-1% DVB) polymer matrix, Cat. No. 01-64-0114, Novabiochem, Merck Biosciences Ltd.) (Barlos et al. Tetrahedron Lett. 1989, 30, 3943-3946) (1.4 mMol/g, 0.7 mmol) was filled into a dried flask. The resin was suspended in CH2Cl2 (2.5 ml) and, allowed to swell at room temperature under constant stirring for 30 min. The resin was treated with 0.49 mMol (0.7 eq) of the first suitably protected amino acid residue and 488 mul (4 eq) of diisopropylethylamine (DIEA) in CH2Cl2 (2.5 ml), the mixture was shaken at 25 C. for 4 hours. The resin was shaken (CH2Cl2/MeOH/DIEA: 17/2/1), 30 ml for 30 min; then washed in the following order with CH2Cl2 (1×), DMF (1×), CH2Cl2 (1×), MeOH (1×), CH2Cl2 (1×), MeOH (1×), CH2Cl2 (2×), Et2O (2×) and dried under vacuum for 6 hours. Loading was typically 0.6-0.9 mMol/g. The following preloaded resin was prepared: Fmoc-Pro-2-chlorotritylresin. Synthesis of the Fully Protected Peptide Fragment The synthesis was carried out on a Syro-peptide synthesizer (MultiSynTech GmbH) using 24 to 96 reaction vessels. In each vessel were placed approximately 60 mg (weight of the resin before loading) of the above resin. The following reaction cycles were programmed and carried out: Steps 3 to 6 are repeated to add each amino-acid. Analytical Method: Analytical HPLC retention times (RT, in minutes) were determined using a Jupiter Proteo 90 A column, 150×2.0 mm, (cod. 00E-4396-B0-Phenomenex) with the following solvents A (H2O+0.1% TFA) and B (CH3CN+0.1% TFA) and the gradient: 0 min: 95% A, 5% B; 0.5 min: 95% A, 5% B; 20 min: 40% A, 60% B; 21 min: 0% A, 100% B; 23 min: 0% A, 100% B; 23.1 min: 95% A, 5% B; 31 min: 95% A, 5% B. Formation of Disulfide beta-Strand Linkage After formation of the disulfide beta-strand linkage, the resin was suspended in 1 ml (0.14 mMol) of 1% TFA in CH2Cl2 (v/v) for 3 minutes and filtered, and the filtrate was neutralized with 1 ml (1.15 mMol) of 20% DIEA in CH2Cl2 (v/v). This procedure was repeated twice to ensure completion of the cleavage. The resin was washed three times with 1 ml of CH2Cl2. The CH2Cl2 layer was evaporated to dryness. The volatiles were removed and 8 ml dry DMF were added to the tube. Then 2 eq. of HATU in dry DMF (1 ml) and 4 eq. of DIPEA in dry DMF (1 ml) were added to the peptide, followed by stirring for 16 h. The volatiles were evaporated to dryness. The crude cyclised peptide was dissolved in 7 ml of CH2Cl2 and extracted with 10% acetonitrile in H2O (4.5 ml) three times. The CH2Cl2 layer was evaporated to dryness. To deprotect the peptide fully, 3 ml of cleavage cocktail TFA:TIS:H2O (95:2.5:2.5) were added, and the mixture was kept for 2.5 h. The volatiles were evaporated to dryness and the crude peptide was dissolved in 20% AcOH in water (7 ml) and extracted with isopropyl ether (4 ml) for three times. The aqueous layer was collected and evaporated to dryness, and the residue was purified by preparative reverse phase HPLC. After lyophilisation the products were obtained as white powders and analysed by the HPLC-ESI-MS analytical method described above. The analytical data comprising purity after preparative HPLC and ESI-MS are given. The peptide was synthesized starting with the amino acid L-Pro which was grafted to the resin. Starting resin was Fmoc-Pro-2-chlorotrityl resin, which was prepared as described above. The linear peptide was synthesized on solid support according to the procedure described above in the following sequence: Resin-Pro-DPro-Lys-Gln-Tyr-Cys-Tyr-Arg-Dab-DPro-Ala-Ser-Cys-Ala-His-Tyr. A disulfide beta-strand linkage was introduced as described above. The product was cleaved from the resin, cyclized, deprotected and purified as indicated by preparative reverse phase LC-MS. After lyophilisation the product was obtained as white powder and analysed by the HPLC-ESI-MS analytical method described above ([M+2H]2+: 933.1; RT: 10.47; UV-purity: 72%).

References: [1]Patent: US9556234,2017,B2 .Location in patent: Page/Page column 6-8.

14
[ 35661-39-3 ]
[ 112883-29-1 ]
[ 71989-31-6 ]
[ 105047-45-8 ]
[ 73724-45-5 ]
[ 71989-20-3 ]
[ 91000-69-0 ]
[ 135248-89-4 ]
[ 71989-31-6 ]
[ 116611-64-4 ]
[ 161420-87-7 ]
C₉₀H₁₂₂N₂₄O₂₂S₂ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
		Coupling of the First Protected Amino Acid Residue to the Resin 0.5 g of 2-chlorotritylchloride resin (100-200 mesh, copoly(styrene-1% DVB) polymer matrix, Cat. No. 01-64-0114, Novabiochem, Merck Biosciences Ltd.) (Barlos et al. Tetrahedron Lett. 1989, 30, 3943-3946) (1.4 mMol/g, 0.7 mmol) was filled into a dried flask. The resin was suspended in CH2Cl2 (2.5 ml) and, allowed to swell at room temperature under constant stirring for 30 min. The resin was treated with 0.49 mMol (0.7 eq) of the first suitably protected amino acid residue and 488 mul (4 eq) of diisopropylethylamine (DIEA) in CH2Cl2 (2.5 ml), the mixture was shaken at 25 C. for 4 hours. The resin was shaken (CH2Cl2/MeOH/DIEA: 17/2/1), 30 ml for 30 min; then washed in the following order with CH2Cl2 (1×), DMF (1×), CH2Cl2 (1×), MeOH (1×), CH2Cl2 (1×), MeOH (1×), CH2Cl2 (2×), Et2O (2×) and dried under vacuum for 6 hours. Loading was typically 0.6-0.9 mMol/g. The following preloaded resin was prepared: Fmoc-Pro-2-chlorotritylresin. Synthesis of the Fully Protected Peptide Fragment The synthesis was carried out on a Syro-peptide synthesizer (MultiSynTech GmbH) using 24 to 96 reaction vessels. In each vessel were placed approximately 60 mg (weight of the resin before loading) of the above resin. The following reaction cycles were programmed and carried out: Steps 3 to 6 are repeated to add each amino-acid. Analytical Method: Analytical HPLC retention times (RT, in minutes) were determined using a Jupiter Proteo 90 A column, 150×2.0 mm, (cod. 00E-4396-B0-Phenomenex) with the following solvents A (H2O+0.1% TFA) and B (CH3CN+0.1% TFA) and the gradient: 0 min: 95% A, 5% B; 0.5 min: 95% A, 5% B; 20 min: 40% A, 60% B; 21 min: 0% A, 100% B; 23 min: 0% A, 100% B; 23.1 min: 95% A, 5% B; 31 min: 95% A, 5% B. Formation of Disulfide beta-Strand Linkage After formation of the disulfide beta-strand linkage, the resin was suspended in 1 ml (0.14 mMol) of 1% TFA in CH2Cl2 (v/v) for 3 minutes and filtered, and the filtrate was neutralized with 1 ml (1.15 mMol) of 20% DIEA in CH2Cl2 (v/v). This procedure was repeated twice to ensure completion of the cleavage. The resin was washed three times with 1 ml of CH2Cl2. The CH2Cl2 layer was evaporated to dryness. The volatiles were removed and 8 ml dry DMF were added to the tube. Then 2 eq. of HATU in dry DMF (1 ml) and 4 eq. of DIPEA in dry DMF (1 ml) were added to the peptide, followed by stirring for 16 h. The volatiles were evaporated to dryness. The crude cyclised peptide was dissolved in 7 ml of CH2Cl2 and extracted with 10% acetonitrile in H2O (4.5 ml) three times. The CH2Cl2 layer was evaporated to dryness. To deprotect the peptide fully, 3 ml of cleavage cocktail TFA:TIS:H2O (95:2.5:2.5) were added, and the mixture was kept for 2.5 h. The volatiles were evaporated to dryness and the crude peptide was dissolved in 20% AcOH in water (7 ml) and extracted with isopropyl ether (4 ml) for three times. The aqueous layer was collected and evaporated to dryness, and the residue was purified by preparative reverse phase HPLC. After lyophilisation the products were obtained as white powders and analysed by the HPLC-ESI-MS analytical method described above. The analytical data comprising purity after preparative HPLC and ESI-MS are given. The peptide was synthesized starting with the amino acid L-Pro which was grafted to the resin. Starting resin was Fmoc-Pro-2-chlorotrityl resin, which was prepared as described above. The linear peptide was synthesized on solid support according to the procedure described above in the following sequence: Resin-Pro-DPro-Lys-Gln-Tyr-Cys-Tyr-Arg-Dab-DPro-Ala-Ser-Cys-Tyr-His-Tyr. A disulfide beta-strand linkage was introduced as described above. The product was cleaved from the resin, cyclized, deprotected and purified as indicated by preparative reverse phase LC-MS. After lyophilisation the product was obtained as white powder and analysed by the HPLC-ESI-MS analytical method described above ([M+2H]2+: 978.6; RT: 10.95; UV-purity: 82%).

References: [1]Patent: US9556234,2017,B2 .Location in patent: Page/Page column 6-8.

15
[ 29022-11-5 ]
[ 35661-39-3 ]
[ 71989-31-6 ]
[ 35661-40-6 ]
[ 71989-28-1 ]
[ 132388-59-1 ]
[ 71989-20-3 ]
[ 55260-24-7 ]
[ 111061-56-4 ]
[ 143824-78-6 ]
C₅₆H₇₆N₁₆O₁₆S [ No CAS ]