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21924-11-8

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21924-11-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21924-11-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,2 and 4 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21924-11:
(7*2)+(6*1)+(5*9)+(4*2)+(3*4)+(2*1)+(1*1)=88
88 % 10 = 8
So 21924-11-8 is a valid CAS Registry Number.

21924-11-8Relevant articles and documents

Practical one-pot amidation of N -Alloc-, N -Boc-, and N -Cbz protected amines under mild conditions

Hong, Wan Pyo,Tran, Van Hieu,Kim, Hee-Kwon

, p. 15890 - 15895 (2021/05/19)

A facile one-pot synthesis of amides from N-Alloc-, N-Boc-, and N-Cbz-protected amines has been described. The reactions involve the use of isocyanate intermediates, which are generated in situ in the presence of 2-chloropyridine and trifluoromethanesulfonyl anhydride, to react with Grignard reagents to produce the corresponding amides. Using this reaction protocol, a variety of N-Alloc-, N-Boc-, and N-Cbz-protected aliphatic amines and aryl amines were efficiently converted to amides with high yields. This method is highly effective for the synthesis of amides and offers a promising approach for facile amidation.

Nickel-catalyzed: C-alkylation of thioamide, amides and esters by primary alcohols through a hydrogen autotransfer strategy

Yang, Peng,Wang, Xiuhua,Ma, Yu,Sun, Yaxin,Zhang, Li,Yue, Jieyu,Fu, Kaiyue,Zhou, Jianrong Steve,Tang, Bo

supporting information, p. 14083 - 14086 (2020/11/20)

A simple catalyst of Ni(OAc)2 and P(t-Bu)3 enables selective C-alkylation of thioacetamides and primary acetamides with alcohols for the first time. Monoalkylation of thioamides, amides and t-butyl esters occurs in excellent yields (>95%). Mechanistic studies reveal that the reaction proceeds via a hydrogen autotransfer pathway. This journal is

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

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