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1232554-40-3

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1232554-40-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1232554-40-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,2,5,5 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1232554-40:
(9*1)+(8*2)+(7*3)+(6*2)+(5*5)+(4*5)+(3*4)+(2*4)+(1*0)=123
123 % 10 = 3
So 1232554-40-3 is a valid CAS Registry Number.

1232554-40-3Downstream Products

1232554-40-3Relevant articles and documents

Chemoselective double annulation of two different isocyanides: Rapid access to trifluoromethylated indole-fused heterocycles

Gao, Yuelei,Hu, Zhongyan,Dong, Jinhuan,Liu, Jun,Xu, Xianxiu

, p. 5292 - 5295 (2017/11/06)

An unprecedented chemoselective double annulation of α-trifluoromethylated isocyanides with o-acylaryl isocyanides has been developed. This new reaction provides a rapid, efficient, and complete atom-economic strategy for the synthesis of trifluoromethylated oxadiazino[3,2-α]indoles in a single operation from readily available starting materials. Isocyanide insertion into C=O double bonds is disclosed for the first time as indicated by the results of 18O-labeling experiment. A mechanism for this domino reaction is proposed involving chemoselective heterodimerization of two different isocyanides, followed by indole-2,3-epoxide formation and rearrangement.

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