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ChemicalBook >> CAS DataBase List >>2,2-Dimethyl-but-3-ynoic acid

2,2-Dimethyl-but-3-ynoic acid

2,2-Dimethyl-but-3-ynoic acid Structure
2,2-Dimethyl-but-3-ynoic acid structure
CAS No.
56663-76-4
Chemical Name:
2,2-Dimethyl-but-3-ynoic acid
Synonyms
AKOS 91882;2,2-Dimethyl-3-butynoic acid;2,2-Dimethyl-but-3-ynoic acid;3-Butynoic acid, 2,2-diMethyl-;2,2-DiMethyl-but-3-ynoic acidI
CBNumber:
CB0190288
Molecular Formula:
C6H8O2
Molecular Weight:
112.13
MDL Number:
MFCD03093337
MOL File:
56663-76-4.mol
MSDS File:
SDS
Last updated:2026-09-12 18:47:37
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2,2-Dimethyl-but-3-ynoic acid Properties

Boiling point 188.2±23.0 °C(Predicted)
Density 1.057±0.06 g/cm3(Predicted)
storage temp. 2-8°C
pka 3.62±0.10(Predicted)
Appearance Colorless to light yellow Liquid

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)Corrosion (GHS05)
GHS07,GHS05
Signal word  Danger
Hazard statements  H314-H335
Precautionary statements  P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501
RIDADR  3265
HazardClass  8
PackingGroup  Ⅱ
HS Code  2916199590

2,2-Dimethyl-but-3-ynoic acid price More Price(42)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Biosynth GCA66376 2,2-Dimethylbut-3-ynoic acid 56663-76-4 2.5g $413 2026-06-04 Buy
Apolloscientific OR917188 2,2-Dimethylbut-3-ynoic acid 92% 56663-76-4 100mg $25 2026-06-04 Buy
Apolloscientific OR917188 2,2-Dimethylbut-3-ynoic acid 92% 56663-76-4 250mg $35 2026-06-04 Buy
Apolloscientific OR917188 2,2-Dimethylbut-3-ynoic acid 92% 56663-76-4 1g $82 2026-06-04 Buy
Matrix Scientific 313937 2,2-Dimethylbut-3-ynoic acid 56663-76-4 1.00g $78 2026-05-19 Buy
Product number Packaging Price Buy
GCA66376 2.5g $413 Buy
OR917188 100mg $25 Buy
OR917188 250mg $35 Buy
OR917188 1g $82 Buy
313937 1.00g $78 Buy

2,2-Dimethyl-but-3-ynoic acid Chemical Properties, Uses, Production

Synthesis

3-CHLORO-2,2-DIMETHYL-BUT-3-ENOIC ACID

56663-75-3

2,2-DIMETHYL-BUT-3-YNOIC ACID

56663-76-4

NaNH2 (17.8 g, 0.458 mol, solid) and DMSO (50 mL) were added to a 500 mL three-neck flask. The mixture was stirred at room temperature until no more NH3 gas was released. A solution of 3-chloro-2,2-dimethylbut-3-enoic acid (17.0 g, 114 mmol) in DMSO (50 mL) was added slowly and dropwise at 0 °C. The reaction mixture was gradually warmed to 50 °C and stirred at this temperature for 5 h, followed by continued stirring at room temperature overnight. Upon completion of the reaction, the mixture was slowly poured into a pre-cooled 20% HCl solution and extracted three times with ether. The ether extracts were combined, dried with anhydrous Na2SO4 and concentrated under reduced pressure to give a mixture of the raw material and 2,2-dimethylbut-3-ynoic acid (in a ratio of about 6:1). The residue was again dissolved in ether, dried by adding anhydrous Na2SO4 and the above reaction conditions were repeated. The reaction mixture was subjected to the same treatment to give the final 2,2-dimethylbut-3-ynoic acid (12.0 g, 94% yield).

References

[1] Patent: WO2010/53471, 2010, A1. Location in patent: Page/Page column 58-60
[2] Journal of the American Chemical Society, 1997, vol. 119, # 16, p. 3802 - 3806
[3] Journal of the American Chemical Society, 1975, vol. 97, p. 4825 - 4836
[4] Patent: US2007/244159, 2007, A1. Location in patent: Page/Page column 130
[5] Patent: US2011/98311, 2011, A1

2,2-Dimethyl-but-3-ynoic acid Preparation Products And Raw materials

Raw materials

3-Chloro-2,2-dimethyl-but-3-enoic acid 3-Butynoic acid, 2,2-dimethyl-4-(trimethylsilyl)-

Preparation Products

2,2-Dimethyl-but-3-ynoic acid Suppliers

Global Suppliers ( 70)
Supplier Tel Email Country ProdList Advantage
Nanjing Chemlin Chemical Co., Ltd 025-83697070 13770331960 info@chemlin.com.cn China 16305 64
Shanghai Sunway Pharmaceutical Technology Co., Ltd 13761987713 hxzheng@sunwaypharm.cn China 8663 57
Nanjing JinruiJiuAn Biotechnology Co., Ltd. 025-58196018 800028039 sales@fartop.net China 2227 55
Shanghai Jian Chao Chemical Technology Co., Ltd. 150-2103-5486 18017383231 983544897@qq.com China 9336 55
Shanghai potentpharm CO.,Ltd 13524892556 sales-cn@potentpharm.com China 1011 55
Bide Pharmatech Ltd. 400-164-7117 18317119277 product02@bidepharm.com China 40000 60
Mashilabs (Shanghai) Co.,Ltd. 19916721580 mafarm@126.com China 4534 58
Shanghai Xingui Biotechnology Co., Ltd. 15121041756 xingui2022@126.com China 9985 58
Tianjin Anhao Biological Technology Co., Ltd. sales@ahpharmatech.com China 5734 55
Shanghai HuanChuan Industry Co.,Ltd. 021-61478794 sales@hcshhai.com China 9781 50
Supplier Advantage
Nanjing Chemlin Chemical Co., Ltd 64
Shanghai Sunway Pharmaceutical Technology Co., Ltd 57
Nanjing JinruiJiuAn Biotechnology Co., Ltd. 55
Shanghai Jian Chao Chemical Technology Co., Ltd. 55
Shanghai potentpharm CO.,Ltd 55
Bide Pharmatech Ltd. 60
Mashilabs (Shanghai) Co.,Ltd. 58
Shanghai Xingui Biotechnology Co., Ltd. 58
Tianjin Anhao Biological Technology Co., Ltd. 55
Shanghai HuanChuan Industry Co.,Ltd. 50

View Latest Price from 2,2-Dimethyl-but-3-ynoic acid manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,2-DIMETHYL-BUT-3-YNOIC ACID pictures 2020-01-13 2,2-DIMETHYL-BUT-3-YNOIC ACID
56663-76-4
 $5.00 1KG 98% 100KG Career Henan Chemical Co

2,2-Dimethyl-but-3-ynoic acid Spectrum

2,2-DIMETHYL-BUT-3-YNOIC ACID(56663-76-4)1HNMR

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2,2-DiMethyl-but-3-ynoic acidI AKOS 91882 3-Butynoic acid, 2,2-diMethyl- 2,2-Dimethyl-3-butynoic acid 2,2-Dimethyl-but-3-ynoic acid 56663-76-4