26421-44-3|2,5-Dimethylthiophene-3-carbaldehyde| Ambeed

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Quality Control of [ 26421-44-3 ] Purity: 98% SDS Specification

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Product Details of [ 26421-44-3 ]

CAS No. :	26421-44-3
Formula :	C₇H₈OS
M.W :	140.20
SMILES Code :	O=CC1=C(C)SC(C)=C1
MDL No. :	MFCD03426895
InChI Key :	WVIQPBIZBQRJAD-UHFFFAOYSA-N
Pubchem ID :	2762759

Safety of [ 26421-44-3 ]

GHS Pictogram:
Signal Word:	Warning
Hazard Statements:	H315-H319-H335
Precautionary Statements:	P264-P302+P352-P304+P340-P305+P351+P338-P332+P313-P337+P313-P501

Computational Chemistry of [ 26421-44-3 ] Show Less

Physicochemical Properties

Num. heavy atoms	9
Num. arom. heavy atoms	5
Fraction Csp3	0.29
Num. rotatable bonds	1
Num. H-bond acceptors	1.0
Num. H-bond donors	0.0
Molar Refractivity	39.64
TPSA ? Topological Polar Surface Area: Calculated from Ertl P. et al. 2000 J. Med. Chem.	45.31 Å²

Lipophilicity

Log P_o/w (iLOGP)? iLOGP: in-house physics-based method implemented from Daina A et al. 2014 J. Chem. Inf. Model.	1.8
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	1.87
Log P_o/w (WLOGP)? WLOGP: Atomistic method implemented from Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.	2.18
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.	1.1
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	3.54
Consensus Log P_o/w? Consensus Log P_o/w: Average of all five predictions	2.1

Water Solubility

Log S (ESOL):? ESOL: Topological method implemented from Delaney JS. 2004 J. Chem. Inf. Model.	-2.23
Solubility	0.821 mg/ml ; 0.00586 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.	-2.44
Solubility	0.505 mg/ml ; 0.0036 mol/l
Class? Solubility class: Log S scale Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly	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	-2.36
Solubility	0.609 mg/ml ; 0.00435 mol/l
Class? Solubility class: Log S scale Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly	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	Yes
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	No
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	Yes
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.	-5.83 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	1.0
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat implemented from Martin YC. 2005 J. Med. Chem.	0.55

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	1.0 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<1.0
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)	1.95

Application In Synthesis of [ 26421-44-3 ]

* 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 [ 26421-44-3 ]

[ 26421-44-3 ] Synthesis Path-Downstream 1~35

1
[ 638-02-8 ]
[ 93-61-8 ]
[ 26421-44-3 ]

References: [1]Journal of Organic Chemistry,1949,vol. 14,p. 638,639.

2
[ 20893-30-5 ]
[ 26421-44-3 ]
3c-(2,5-dimethyl-[3]thienyl)-2-[2]thienyl-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

3
[ 26421-44-3 ]
[ 2947-61-7 ]
3c-(2,5-dimethyl-[3]thienyl)-2-p-tolyl-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

4
[ 26421-44-3 ]
[ 132-75-2 ]
3c-(2,5-dimethyl-[3]thienyl)-2-[1]naphthyl-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

5
[ 26421-44-3 ]
[ 5370-25-2 ]
[ 100375-01-7 ]

References: [1]Bulletin de la Societe Chimique de France,1956,p. 1646,1648.

6
[ 26421-44-3 ]
[ 3216-48-6 ]
2-benzo[b]thiophen-3-yl-3c-(2,5-dimethyl-[3]thienyl)-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1951,p. 255.

7
[ 26421-44-3 ]
[ 141-82-2 ]
[ 244759-47-5 ]

References: [1]Journal of the American Chemical Society,1950,vol. 72,p. 3414.

8
[ 26421-44-3 ]
[ 16532-79-9 ]
2-(4-bromo-phenyl)-3c-(2,5-dimethyl-[3]thienyl)-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1952,p. 4590,4593.

9
[ 26421-44-3 ]
[ 7498-57-9 ]
3c-(2,5-dimethyl-[3]thienyl)-2-[2]naphthyl-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1952,p. 4590,4593.

10
[ 26421-44-3 ]
[ 118-96-7 ]
2,5-dimethyl-3-(2,4,6-trinitro-styryl)-thiophene [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

11
[ 26421-44-3 ]
[ 459-22-3 ]
[ 366-20-1 ]

References: [1]Journal of the Chemical Society,1952,p. 4590,4593.

12
[ 26421-44-3 ]
[ 51628-12-7 ]
3c-(2,5-dimethyl-[3]thienyl)-2-(4-iodo-phenyl)-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1952,p. 4590,4593.

13
[ 26421-44-3 ]
[ 696-61-7 ]
2,5-dimethyl-3-(4-methyl-styryl)-thiophene [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

14
[ 26421-44-3 ]
[ 141-97-9 ]
2-acetyl-3ξ-(2,5-dimethyl-[3]thienyl)-acrylic acid ethyl ester [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

15
[ 26421-44-3 ]
[ 141-97-9 ]
2-(2,5-dimethyl-[3]thienyl)-4-hydroxy-4-methyl-6-oxo-cyclohexane-1,3-dicarboxylic acid diethyl ester [ No CAS ]

References: [1]Journal of the American Chemical Society,1954,vol. 76,p. 2731.

16
[ 26421-44-3 ]
[ 140-29-4 ]
3c-(2,5-dimethyl-[3]thienyl)-2-phenyl-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

17
[ 26421-44-3 ]
[ 555-21-5 ]
3c-(2,5-dimethyl-[3]thienyl)-2-(4-nitro-phenyl)-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

18
[ 26421-44-3 ]
[ 51433-48-8 ]
[ 26421-46-5 ]

References: [1]Journal of Organic Chemistry,1949,vol. 14,p. 638,639.

19
[ 26421-44-3 ]
[ 121-69-7 ]
[ 115034-68-9 ]

References: [1]Journal of Organic Chemistry,1958,vol. 23,p. 560,563.

20
[ 26421-44-3 ]
[ 83-33-0 ]
2-((Ξ)-2,5-dimethyl-[3]thienylmethylene)-indan-1-one [ No CAS ]

References: [1]Journal of the Chemical Society,1952,p. 2225,2226.

21
[ 26421-44-3 ]
[ 104-47-2 ]
3c-(2,5-dimethyl-[3]thienyl)-2-(4-methoxy-phenyl)-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

22
[ 26421-44-3 ]
[ 100-63-0 ]
2,5-dimethyl-thiophene-3-carbaldehyde-phenylhydrazone [ No CAS ]

References: [1]Journal of the American Chemical Society,1950,vol. 72,p. 1422.

23
[ 26421-44-3 ]
[ 93-08-3 ]
[ 101893-91-8 ]

References: [1]Bulletin de la Societe Chimique de France,1956,p. 1646,1648.

24
[ 26421-44-3 ]
[ 6921-34-2 ]
2,5-dimethyl-3-styryl-thiophene [ No CAS ]

References: [1]Journal of the Chemical Society,1950,p. 2130,2134.

25
[ 26421-44-3 ]
[ 140-53-4 ]
2-(4-chloro-phenyl)-3c-(2,5-dimethyl-[3]thienyl)-acrylonitrile [ No CAS ]

References: [1]Journal of the Chemical Society,1952,p. 4590,4593.

26
[ 26421-44-3 ]
[ 1795-05-7 ]

References: [1]Journal of Organic Chemistry,1949,vol. 14,p. 638,639.

27
[ 26421-44-3 ]
[ 875238-39-4 ]

Yield	Reaction Conditions	Operation in experiment
800 mg	With methanol; sodium tetrahydroborate; at 18 - 25℃; for 1h;	To a stirred solution of 2,5-dimethylthiophene-3-carbaldehyde (1 g, 7.14 mmol) in MeOH (5 mL) at RT wasadded NaBH4 (542 mg, 14.28 mmol) in portions. After 1 h,a saturated ammonium chloride solution (1 0 mL) was addedto quench the reaction and extracted with EtOAc (20 mLx3).The combined organic phase was dried over Na2S04 andconcentrated. The residue was purified by silica-gel columnchromatography (Et0Ac/hexane=1:6) to give 800 mg of(2,5-dimethylthiophen-3-yl)methanol as a colorless oil. GCMS:142 (M+).

References: [1]Journal of the American Chemical Society,1950,vol. 72,p. 3414.
[2]Patent: US2018/258065,2018,A1 .Location in patent: Paragraph 0129; 0227.

28
[ 26421-44-3 ]
[ 26421-32-9 ]

Yield	Reaction Conditions	Operation in experiment
	With Jones reagent; In acetone; at 0 - 20℃; for 6h;	To a solution of 2,5-dimethylthiophene-3-carbaldehyde (1.0 g, 7.13 mmol) in acetone (4 ml) cooled to 0 C was added 6 M Jones reagent (1.18 ml, 7.13 mmol). The mixture was allowed to warm to rt and stirred for 6 h. The solution was acidified to pH 5 with 1 M hydrochloric acid, then the resulting mixture was extracted with EtOAc (3 x 10 ml). The combined organic phases were concentrated under reduced pressure to give 2,5-dimethylthiophene-3-carboxylic acid as a brown solid. This was used directly without purification. 1H NMR (400 MHz, chloroform-d) d 7.09 (s, 1H), 2.70 (s, 3H), 2.40 (s, 3H).

References: [1]Russian Chemical Bulletin,2005,vol. 54,p. 1208 - 1213.
[2]Journal of Organic Chemistry,1949,vol. 14,p. 638,639.
[3]Patent: WO2020/249664,2020,A1 .Location in patent: Paragraph 0951-0952.

29
[ 26421-44-3 ]
[ 50382-40-6 ]

References: [1]Zhurnal Obshchei Khimii,1956,vol. 26,p. 2595,2599; engl. Ausg. S. 2893, 2896.

30
[ 57248-13-2 ]
[ 26421-44-3 ]

References: [1]Journal of the American Chemical Society,1950,vol. 72,p. 3414.

31
[ 638-02-8 ]
[ 5312-73-2 ]
[ 26421-44-3 ]

References: [1]Journal of the Chemical Society. Perkin transactions I,1985,p. 957 - 962.

32
[ 26421-44-3 ]
[ 42103-98-0 ]
[ 97665-15-1 ]

References: [1]Journal of the Chemical Society. Perkin transactions I,1985,p. 957 - 962.

33
[ 26421-44-3 ]
[ 26421-45-4 ]

References: [1]Chemistry of Heterocyclic Compounds,1988,vol. 24,p. 850 - 856.
Khimiya Geterotsiklicheskikh Soedinenii,1988,vol. 24,p. 1034 - 1040.

34
[ 84815-20-3 ]
[ 74-88-4 ]
[ 26421-44-3 ]

References: [1]Journal of Organic Chemistry,1987,vol. 52,p. 104 - 109.

35
[ 26421-44-3 ]
[ 141-97-9 ]
1,4-dihydro-2,6-dimethyl-4-(2,5-dimethyl-3-thienyl)-3,5-pyridinedicarboxylic acid bis-(1,1-ethyl ester) [ No CAS ]

References: [1]European Journal of Medicinal Chemistry,1996,vol. 31,p. 547 - 556.

Historical Records

Technical Information

• Barbier Coupling Reaction • Baylis-Hillman Reaction • Bucherer-Bergs Reaction • Clemmensen Reduction • Complex Metal Hydride Reductions • Corey-Chaykovsky Reaction • Corey-Fuchs Reaction • Fischer Indole Synthesis • Grignard Reaction • Hantzsch Dihydropyridine Synthesis • Henry Nitroaldol Reaction • Horner-Wadsworth-Emmons Reaction • Hydride Reductions • Julia-Kocienski Olefination • Knoevenagel Condensation • Leuckart-Wallach Reaction • McMurry Coupling • Meerwein-Ponndorf-Verley Reduction • Mukaiyama Aldol Reaction • Nozaki-Hiyama-Kishi Reaction • Passerini Reaction • Paternò-Büchi Reaction • Petasis Reaction • Pictet-Spengler Tetrahydroisoquinoline Synthesis • Preparation of Aldehydes and Ketones • Preparation of Amines • Prins Reaction • Reactions of Aldehydes and Ketones • Reactions of Amines • Reformatsky Reaction • Schlosser Modification of the Wittig Reaction • Schmidt Reaction • Stetter Reaction • Stobbe Condensation • Tebbe Olefination • Ugi Reaction • Wittig Reaction • Wolff-Kishner Reduction

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P305 + P351 + P338	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P306 + P360	IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes.
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H225	Highly flammable liquid and vapour
H226	Flammable liquid and vapour
H227	Combustible liquid
H228	Flammable solid
H229	Pressurized container: may burst if heated
H230	May react explosively even in the absence of air
H231	May react explosively even in the absence of air at elevated pressure and/or temperature
H240	Heating may cause an explosion
H241	Heating may cause a fire or explosion
H242	Heating may cause a fire
H250	Catches fire spontaneously if exposed to air
H251	Self-heating; may catch fire
H252	Self-heating in large quantities; may catch fire
H260	In contact with water releases flammable gases which may ignite spontaneously
H261	In contact with water releases flammable gas
H270	May cause or intensify fire; oxidizer
H271	May cause fire or explosion; strong oxidizer
H272	May intensify fire; oxidizer
H280	Contains gas under pressure; may explode if heated
H281	Contains refrigerated gas; may cause cryogenic burns or injury
H290	May be corrosive to metals
Health hazards
Code	Phrase
H300	Fatal if swallowed
H301	Toxic if swallowed
H302	Harmful if swallowed
H303	May be harmful if swallowed
H304	May be fatal if swallowed and enters airways
H305	May be harmful if swallowed and enters airways
H310	Fatal in contact with skin
H311	Toxic in contact with skin
H312	Harmful in contact with skin
H313	May be harmful in contact with skin
H314	Causes severe skin burns and eye damage
H315	Causes skin irritation
H316	Causes mild skin irritation
H317	May cause an allergic skin reaction
H318	Causes serious eye damage
H319	Causes serious eye irritation
H320	Causes eye irritation
H330	Fatal if inhaled
H331	Toxic if inhaled
H332	Harmful if inhaled
H333	May be harmful if inhaled
H334	May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335	May cause respiratory irritation
H336	May cause drowsiness or dizziness
H340	May cause genetic defects
H341	Suspected of causing genetic defects
H350	May cause cancer
H351	Suspected of causing cancer
H360	May damage fertility or the unborn child
H361	Suspected of damaging fertility or the unborn child
H361d	Suspected of damaging the unborn child
H362	May cause harm to breast-fed children
H370	Causes damage to organs
H371	May cause damage to organs
H372	Causes damage to organs through prolonged or repeated exposure
H373	May cause damage to organs through prolonged or repeated exposure
Environmental hazards
Code	Phrase
H400	Very toxic to aquatic life
H401	Toxic to aquatic life
H402	Harmful to aquatic life
H410	Very toxic to aquatic life with long-lasting effects
H411	Toxic to aquatic life with long-lasting effects
H412	Harmful to aquatic life with long-lasting effects
H413	May cause long-lasting harmful effects to aquatic life
H420	Harms public health and the environment by destroying ozone in the upper atmosphere

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CAS No.: 26421-44-3

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CAS No.: 26421-44-3

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[ 26421-44-3 ] Synthesis Path-Downstream 1~35

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