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1257310-92-1

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1257310-92-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257310-92-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,3,1 and 0 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1257310-92:
(9*1)+(8*2)+(7*5)+(6*7)+(5*3)+(4*1)+(3*0)+(2*9)+(1*2)=141
141 % 10 = 1
So 1257310-92-1 is a valid CAS Registry Number.

1257310-92-1Relevant articles and documents

Synthesis of protected α-amino acids: Via decarboxylation amination from malonate derivatives

Dai, Qipu,Fu, Hui,Hu, Changwen,Li, Peihe,Li, Xiaoying,Wang, Zheng

, p. 4439 - 4446 (2020/10/20)

A general and efficient strategy for the synthesis of protected α-amino acids is reported. The method uses malonate derivatives as the starting materials and Cs2CO3 as a base at 60 degrees, giving α-amino acid derivatives in moderate yields by releasing CO2. This methodology shows broad substrate scope (primary and secondary acids), excellent functional group tolerance and high efficiency to give the desired products under mild reaction conditions. It also allows the construction of β and γ-amino acids and other unnatural products.

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