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20929-40-2

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20929-40-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20929-40-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,2 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20929-40:
(7*2)+(6*0)+(5*9)+(4*2)+(3*9)+(2*4)+(1*0)=102
102 % 10 = 2
So 20929-40-2 is a valid CAS Registry Number.

20929-40-2Relevant articles and documents

Preparation of alkylated compounds using the trialkylphosphate

-

Paragraph 0217; 0227, (2021/11/02)

[Problem] trialkylphosphate strong base used reaction agent, a carboxylic acid, a ketone, an aldehyde, amine, amide, thiol, ester or Grignard reagent to a variety of substrates, and/or high efficiency to generate a highly stereoselective alkylation reaction, the alkylated compounds capable of producing new means. [Solution] was used as the alkylating agent in the alkylation of compound trialkylphosphate, strongly basic reaction production use. [Drawing] no

Palladium-Catalyzed Hydrocarbonylative C-N Coupling of Alkenes with Amides

Zhou, Xibing,Zhang, Guoying,Gao, Bao,Huang, Hanmin

supporting information, p. 2208 - 2212 (2018/04/30)

An efficient palladium-catalyzed hydrocarbonylative C-N coupling of alkenes with amides has been developed. The reaction was performed via hydrocarbonylation of alkenes, followed by acyl metathesis with amides. Both intermolecular and intramolecular react

Radical Cyclizations of Alkenyl-Substituted 4,5-Dihydro-1,3-thiazole-5-thiols

Jenny, Christjohannes von,Wipf, Peter,Heimgartner, Heinz

, p. 838 - 846 (2007/10/02)

Heating of 5-alkenyl- or 5-alkinyl-4,5-dihydro-1,3-thiazole-5-thiols of type 5 in the presence of a radical initiator gave dithiaspirobicycles in fair-to-excellent yield (Scheme 3).Under analogous conditions, the 4,5-dihydro-4-vinyl-1,3-thiazole-5-thiol 5d underwent a cyclization to give the annellated dithiabicycle 7 (Scheme 4).In this reaction, a minor product 8 was formed by an unknown reaction mechanism.The structure of 8 was established by X-ray crystallography.The starting 1,3-thiazole-5-thiols 5 have been synthesized by carbophilic alkylation of the C=S group of 1,3-thiazole-5(4H)-thiones with Grignard-reagents or alkylcuprates.The thiazolethiones were obtained by the reaction of 3-amino-2H-azirines with thiobenzoic acid followed by sulfurization and cyclization.The 4-benzyl derivative 1b was thermally rearranged via 1,3-benzyl migration to yield the benzyl (1,3-thiazol-5-yl) sulfide 11 (Scheme 5).

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