Structure of Boc-Met-OH
CAS No.: 2488-15-5
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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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| CAS No. : | 2488-15-5 |
| Formula : | C10H19NO4S |
| M.W : | 249.33 |
| SMILES Code : | O=C(O)[C@@H](NC(OC(C)(C)C)=O)CCSC |
| MDL No. : | MFCD00065586 |
| InChI Key : | IMUSLIHRIYOHEV-ZETCQYMHSA-N |
| Pubchem ID : | 89857 |
| GHS Pictogram: |
|
| Signal Word: | Warning |
| Hazard Statements: | H319 |
| Precautionary Statements: | P305+P351+P338 |
| Num. heavy atoms | 16 |
| Num. arom. heavy atoms | 0 |
| Fraction Csp3 | 0.8 |
| Num. rotatable bonds | 8 |
| Num. H-bond acceptors | 4.0 |
| Num. H-bond donors | 2.0 |
| Molar Refractivity | 64.06 |
| TPSA ? Topological Polar Surface Area: Calculated from |
100.93 Ų |
| Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.03 |
| Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
1.56 |
| Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
1.72 |
| Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
1.13 |
| Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
0.82 |
| Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
1.45 |
| Log S (ESOL):? ESOL: Topological method implemented from |
-1.84 |
| Solubility | 3.6 mg/ml ; 0.0144 mol/l |
| Class? Solubility class: Log S scale |
Very soluble |
| Log S (Ali)? Ali: Topological method implemented from |
-3.29 |
| Solubility | 0.128 mg/ml ; 0.000513 mol/l |
| Class? Solubility class: Log S scale |
Soluble |
| Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-1.57 |
| Solubility | 6.76 mg/ml ; 0.0271 mol/l |
| Class? Solubility class: Log S scale |
Soluble |
| 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) |
No |
| CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
| CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
| CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
| CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
| CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
| Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-6.71 cm/s |
| Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
| Ghose? Ghose filter: implemented from |
None |
| Veber? Veber (GSK) filter: implemented from |
0.0 |
| Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
| Muegge? Muegge (Bayer) filter: implemented from |
0.0 |
| Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.56 |
| PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
| Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
| Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<2.0 |
| Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
3.15 |
* 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.

[ 2488-15-5 ]
[ 13734-34-4 ]
[ 47355-10-2 ]
[ 131570-56-4 ]

[ 4530-20-5 ]
[ 13139-16-7 ]
[ 13139-15-6 ]
[ 15761-38-3 ]
[ 2488-15-5 ]
[ 7536-55-2 ]
[ 19746-37-3 ]
[ 27144-18-9 ]
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[ 23680-31-1 ]
[ 55260-24-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 100% | General procedure: 38% Hydrogen peroxide (0.094 mL, 1.2 mmol) was added to a solution of Boc-Met or a methionine-containing peptide in acetic acid (7 mL). The solution was maintained at 20 C for 30 min. After that 5% Pd/C (0.2 g) was charged, and the mixture stirred for another 30 min. The charcoal was filtered off and the filtrate evaporated under vacuum. In the case of Boc-Met, the residue was dissolved in toluene, evaporated under vacuum, and the product dried in a vacuum desiccator over P4O10. In the case of a methionine-containing peptide, the residue was dissolved in water and lyophilized. |
[ 4530-20-5 ]
[ 15761-39-4 ]
[ 13139-16-7 ]
[ 15761-38-3 ]
[ 2488-15-5 ]

[ 61925-77-7 ]
[ 47355-10-2 ]
[ 65420-40-8 ]
[ 25024-53-7 ]

[ 4530-20-5 ]
[ 2488-15-5 ]
[ 7536-58-5 ]
[ 13734-34-4 ]
[ 47355-10-2 ]
[ 57-10-3 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| General procedure: The second portion of the CCK4 peptide and the SubP peptide were modified on resin as follows to yield test lipidated peptides (1-SubP-COOH and 1-CCK4-Gly-COOH). Spacers (these are AA's used between the peg linker and the peptide of interest) were introduced on the peptides before pegylation (KGG for SubP and GG for CCK4). The free N-terminus of the peptide on resin was first pegylated with N-Fmoc-PEG8-propionic acid using standard HBTU coupling conditions. The N-Fmoc protecting group was removed by treatment with 10% piperidine in DMF (N,N-Dimethylformamide) for 5 min. Palmitic acid was subsequently coupled with the N-terminal free amine of the pegylated peptide. Peptides were cleaved from the resin using high HF conditions with minor modifications to the usual procedure. For the SubP peptide, longer times were used to ensure removal of Arg(Tos) protecting group (90% anhydrous HF/10% anisole at 0 C. for 2 h). For the CCK-4 peptides, 1,3-propanedithiol was used in the HF cleavage mixture to ensure deprotection of the formyl protecting group and prevent oxidation of methionine to its sulfoxide derivative: 85% anhydrous HF/10% anisole/5% PDT (1,3-propaneithiol) at 0 C. for 2 h) (Matsueda, 1982). Following cleavage from resin, peptides were precipitated with cold Et2O. Unmodified peptides were extracted using 10% AcOH in water and the lipidated peptides were extracted using 10% AcOH in H2O followed by 10% AcOH in 50% EtOH/H2O. Crude peptides were purified by RP-HPLC [Vydac C18, 10 m, 22 mm×250 mm]. The purities of the peptides were assessed by analytical RP-HPLC [Vydac C18, 5 m, 4 mm×250 mm]. |
[ 4530-20-5 ]
[ 2488-15-5 ]
[ 7536-58-5 ]
[ 13734-34-4 ]
[ 47355-10-2 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Peptides illustrated in FIG. 9 were synthesized using the in-situ neutralization protocol for t-Boc chemistry (Schnolzer et al., In situ neutralization in Boc-chemistry solid phase peptide synthesis. Rapid, high yield assembly of difficult sequences, 1992, International journal of peptide and protein research 40:180-193) on PAM resin on a 0.5 mmol scale. Amino acids were used with the following side chain protecting groups: Arg(Tos), Asp(OBzl), Gln(Xan), Lys(Fmoc), Lys(2-Cl-Z) and Trp(For). Peptide coupling reactions were carried out with a 4-fold excess (2.0 mmol) of activated amino acid for at least 15 min. The t-Boc protecting group on the N-terminus was removed using trifluoroacetic acid (TFA). The PAM resin from the CCK4 peptide synthesis was split into two equal portions. One portion of the resin was used for synthesizing non-lipidated peptides. The CCK4 (s-CCK-Gly-COOH) peptide was left unmodified at the N-terminus. This peptide served as positive control for the lipidated counterparts. |

[ 4530-20-5 ]
[ 15761-39-4 ]
[ 13139-15-6 ]
[ 2488-15-5 ]
[ 13734-34-4 ]
[ 13836-37-8 ]
[ 84624-27-1 ]
[ 54613-99-9 ]
[ 55260-24-7 ]
[ 57-10-3 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| General procedure: The second portion of the CCK4 peptide and the SubP peptide were modified on resin as follows to yield test lipidated peptides (1-SubP-COOH and 1-CCK4-Gly-COOH). Spacers (these are AA's used between the peg linker and the peptide of interest) were introduced on the peptides before pegylation (KGG for SubP and GG for CCK4). The free N-terminus of the peptide on resin was first pegylated with N-Fmoc-PEG8-propionic acid using standard HBTU coupling conditions. The N-Fmoc protecting group was removed by treatment with 10% piperidine in DMF (N,N-Dimethylformamide) for 5 min. Palmitic acid was subsequently coupled with the N-terminal free amine of the pegylated peptide. Peptides were cleaved from the resin using high HF conditions with minor modifications to the usual procedure. For the SubP peptide, longer times were used to ensure removal of Arg(Tos) protecting group (90% anhydrous HF/10% anisole at 0 C. for 2 h). For the CCK-4 peptides, 1,3-propanedithiol was used in the HF cleavage mixture to ensure deprotection of the formyl protecting group and prevent oxidation of methionine to its sulfoxide derivative: 85% anhydrous HF/10% anisole/5% PDT (1,3-propaneithiol) at 0 C. for 2 h) (Matsueda, 1982). Following cleavage from resin, peptides were precipitated with cold Et2O. Unmodified peptides were extracted using 10% AcOH in water and the lipidated peptides were extracted using 10% AcOH in H2O followed by 10% AcOH in 50% EtOH/H2O. Crude peptides were purified by RP-HPLC [Vydac C18, 10 m, 22 mm×250 mm]. The purities of the peptides were assessed by analytical RP-HPLC [Vydac C18, 5 m, 4 mm×250 mm]. |
[ 4530-20-5 ]
[ 15761-39-4 ]
[ 13139-15-6 ]
[ 2488-15-5 ]
[ 13734-34-4 ]
[ 13836-37-8 ]
[ 84624-27-1 ]
[ 54613-99-9 ]
[ 55260-24-7 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| Peptides illustrated in FIG. 9 were synthesized using the in-situ neutralization protocol for t-Boc chemistry (Schnolzer et al., In situ neutralization in Boc-chemistry solid phase peptide synthesis. Rapid, high yield assembly of difficult sequences, 1992, International journal of peptide and protein research 40:180-193) on PAM resin on a 0.5 mmol scale. Amino acids were used with the following side chain protecting groups: Arg(Tos), Asp(OBzl), Gln(Xan), Lys(Fmoc), Lys(2-Cl-Z) and Trp(For). Peptide coupling reactions were carried out with a 4-fold excess (2.0 mmol) of activated amino acid for at least 15 min. The t-Boc protecting group on the N-terminus was removed using trifluoroacetic acid (TFA). The PAM resin from the CCK4 peptide synthesis was split into two equal portions. One portion of the resin was used for synthesizing non-lipidated peptides. The CCK4 (s-CCK-Gly-COOH) peptide was left unmodified at the N-terminus. This peptide served as positive control for the lipidated counterparts. |

[ 13734-41-3 ]
[ 13139-15-6 ]
[ 15761-38-3 ]
[ 2488-15-5 ]
[ 13734-34-4 ]
[ 15260-10-3 ]
[ 13836-37-8 ]
[ 23680-31-1 ]
[ 73821-95-1 ]
[ 61925-77-7 ]
[ 54613-99-9 ]
[ 47689-67-8 ]
[ 47355-10-2 ]
[ 65420-40-8 ]
[ 98115-14-1 ]
[ 20866-46-0 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| EXAMPLE 1 Synthesis of Glucagon Cys17(1-29) and Similar MonoCys Analogs (0283) 0.2mmole Boc Thr(OBzl) Pam resin (SynChem Inc) in a 60ml reaction vessel and the following sequence was entered and run on a modified Applied Biosystems 430A Peptide Synthesizer using FastBoc HBTU-activated single couplings. (0284) HSQGTFTSDYSKYLDSCRAQDFVQWLMNT (SEQ ID NO: 35) The following side chain protecting groups were used: Arg(Tos), Asp(OcHex), Asn(Xan), Cys(pMeBzl), Glu(OcHex), His(Boc), Lys(2Cl-Z), Ser(Bzl), Thr(Bzl), Trp(CHO), and Tyr(Br-Z). The completed peptidyl resin was treated with 20% piperidine/dimethylformamide to remove the Trp formyl protection then transferred to an HF reaction vessel and dried in vacuo. 1.0ml p-cresol and 0.5 ml dimehyl sulfide were added along with a magnetic stir bar. The vessel was attached to the HF apparatus (Pennisula Labs), cooled in a dry ice/methanol bath, evacuated, and aprox. 10ml liquid hydrogen fluoride was condensed in. The reaction was stirred in an ice bath for 1hr then the HF was removed in vacuo. The residue was suspended in ethyl ether; the solids were filtered, washed with ether, and the peptide extracted into 50 ml aqueous acetic acid. An analytical HPLC was run [0.46 x 5 cm Zorbax C8, 1 ml/min, 45C, 214nm, A buffer of 0.1%TFA, B buffer of 0.1%TFA/90%ACN, gradient=10%B to 80%B over 10min.] with a small sample of the cleavage extract. The remaining extract was loaded onto a 2.2 x 25cm Kromasil C18 preparative reverse phase column and an acetonitrile gradient was run using a Pharmacia FPLC system. 5min fractions were collected while monitoring the UV at 214nm (2.0A). A=0.1%TFA, B=0.1%TFA/50%acetonitrile. Gradient = 30%B to 100%B over 450min. (0285) The fractions containing the purest product (48-52) were combined frozen, and lyophilized to give 30.1mg. An HPLC analysis of the product demonstrated a purity of>90% and MALDI mass spectral analysis demonstrated the desired mass of 3429.7. Glucagon Cys21, Glucagon Cys24, and Glucagon Cys29 were similarly prepared. |
[ 15761-39-4 ]
[ 13734-41-3 ]
[ 13139-15-6 ]
[ 15761-38-3 ]
[ 2488-15-5 ]
[ 13734-34-4 ]
[ 15260-10-3 ]
[ 13836-37-8 ]
[ 23680-31-1 ]
[ 73821-95-1 ]
[ 61925-77-7 ]
[ 54613-99-9 ]
[ 47689-67-8 ]
[ 47355-10-2 ]
[ 65420-40-8 ]
[ 98115-14-1 ]
[ 20866-46-0 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| 198.1 mg | EXAMPLE 2 Synthesis of Glucagon-Cex and Other C-Terminal Extended Analogs. (0286) 285mg (0.2mmole) methoxybenzhydrylamine resin (Midwest Biotech) was placed in a 60ml reaction vessel and the following sequence was entered and run on a modified Applied Biosystems 430A peptide synthesizer using FastBoc HBTU-activated single couplings. (0287) HSQGTFTSDYSKYLDSRRAQDFVQWLMNTGPSSGAPPPS (SEQ ID NO: 36) The following side chain protecting groups were used: Arg(Tos), Asp(OcHex), Asn(Xan), Cys(pMeBzl), Glu(OcHex), His(Boc), Lys(2Cl-Z), Ser(Bzl), Thr(Bzl), Trp(CHO), and Tyr(Br-Z). The completed peptidyl resin was treated with 20% piperidine/dimethylformamide to remove the Trp formyl protection then transferred to HF reaction vessel and dried in vacuo. 1.0ml p-cresol and 0.5 ml dimehyl sulfide were added along with a magnetic stir bar. The vessel was attached to the HF apparatus (Pennisula Labs), cooled in a dry ice/methanol bath, evacuated, and aprox. 10ml liquid hydrogen fluoride was condensed in. The reaction was stirred in an ice bath for 1hr then the HF was removed in vacuo. The residue was suspended in ethyl ether; the solids were filtered, washed with ether, and the peptide extracted into 50 ml aqueous acetic acid. An analytical HPLC was run [0.46 x 5 cm Zorbax C8, 1 ml/min, 45C, 214nm, A buffer of 0.1%TFA, B buffer of 0.1%TFA/90%ACN, gradient=10%B to 80%B over 10min.] on an aliquot of the cleavage extract. The extract was loaded onto a 2.2 x 25cm Kromasil C18 preparative reverse phase column and an acetonitrile gradient was run for elution using a Pharmacia FPLC system. 5min fractions were collected while monitoring the UV at 214nm (2.0A). A=0.1%TFA, B=0.1%TFA/50%acetonitrile. Gradient = 30%B to 100%B over 450min. Fractions 58-65 were combined, frozen and lyophilized to give 198.1mg. (0288) HPLC analysis of the product showed a purity of greater than 95%. MALDI mass spectral analysis showed the presence of the desired theoretical mass of 4316.7 with the product as a C-terminal amide. Oxyntomodulin and oxyntomodulin-KRNR were similarly prepared as the C-terminal carboxylic acids starting with the appropriately loaded PAM-resin. |
[ 13734-41-3 ]
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[ 15761-38-3 ]
[ 2488-15-5 ]
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[ 15260-10-3 ]
[ 13836-37-8 ]
[ 23680-31-1 ]
[ 73821-95-1 ]
[ 123417-18-5 ]
[ 84624-27-1 ]
[ 47689-67-8 ]
[ 47355-10-2 ]
[ 83468-83-1 ]
[ 65420-40-8 ]
[ 98115-14-1 ]
| Yield | Reaction Conditions | Operation in experiment |
|---|---|---|
| EXAMPLE 11 Synthesis of Glucagon Lactams (0299) 285 mg (0.2 mmole) methoxybenzhydrylamine resin (Midwest Biotech) was added to a 60 mL reaction vessels and the following sequence was assembled on a modified Applied Biosystems 430A peptide synthesizer using Boc DEPBT-activated single couplings. HSQGTFTSDYSKYLDERRAQDFVQWLMNT-NH2 (12-16 Lactam; SEQ ID NO: 12) (0300) The following side chain protecting groups were used: Arg(Tos), Asp(OcHx), Asn(Xan), Glu(OFm), His(BOM), Lys(Fmoc), Ser(Bzl), Thr(Bzl), Trp(CHO), Tyr(Br-Z). Lys(Cl-Z) was used at position 12 if lactams were constructed from 16-20, 20-24, or 24-28. The completed peptidyl resin was treated with 20% piperidine/dimethylformamide for one hour with rotation to remove the Trp formyl group as well as the Fmoc and OFm protection from Lys12 and Glu16. Upon confirmation of removal by a positive ninhydrin test, the resin was washed with dimethylformamide, followed by dichloromethane and than again with dimethylformamide. The resin was treated with 520 mg (1 mmole) Benzotriazole-1-yl-oxy-tris-pyrrolidino-phosphonium hexafluorophosphate (PyBOP) in dimethylformamide and diisopropylethylamine (DIEA). The reaction proceeded for 8-10 hours and the cyclization was confirmed by a negative ninhydrin reaction. The resin was washed with dimethylformamide, followed by dichloromethane and subsequently treated with trifluoroacetic acid for 10 minutes. The removal of the Boc group was confirmed by a positive ninhydrin reaction. The resin was washed with dimethylformamide and dichloromethane and dried before being transferred to a hydrofluoric acid (HF) reaction vessel. 500 muL p-cresol was added along with a magnetic stir bar. The vessel was attached to the HF apparatus (Peninsula Labs), cooled in a dry ice/methanol bath, evacuated, and approximately 10 mL of liquid hydrofluoric acid was condensed into the vessel. The reaction was stirred for 1 hour in an ice bath and the HF was subsequently removed in vacuo. The residue was suspended in ethyl ether; the solids were filtered, washed with ether, and the peptide was solubilized with 150 mL 20% acetonitrile/1% acetic acid. (0301) An analytical HPLC analysis of the crude solubilized peptide was conducted under the following conditions [4.6 X 30 mm Xterra C8, 1.50 mL/min, 220 nm, A buffer 0.1% TFA/10% ACN, B buffer 0.1% TFA/100% ACN, gradient 5-95%B over 15 minutes]. The extract was diluted twofold with water and loaded onto a 2.2 X 25 cm Vydac C4 preparative reverse phase column and eluted using an acetonitrile gradient on a Waters HPLC system (A buffer of 0.1% TFA/10% ACN, B buffer of 0.1% TFA/10% CAN and a gradient of 0-100% B over 120 minutes at a flow of 15.00 ml/min. HPLC analysis of the purified peptide demonstrated greater than 95% purity and electrospray ionization mass spectral analysis confirmed a mass of 3506 Da for the 12-16 lactam. Lactams from 16-20, 20-24, and 24-28 were prepared similarly. |