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81638-05-3

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81638-05-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81638-05-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,3 and 8 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 81638-05:
(7*8)+(6*1)+(5*6)+(4*3)+(3*8)+(2*0)+(1*5)=133
133 % 10 = 3
So 81638-05-3 is a valid CAS Registry Number.

81638-05-3Relevant articles and documents

Palladium-catalyzed C–P bond activation of aroyl phosphine oxides without the adjacent “anchoring atom”

Chen, Xingyu,Liu, Xiaoyan,Zhu, Hong,Wang, Zhiqian

, (2021/01/14)

A novel palladium-catalyzed decarbonylation of aroyl phosphine oxides to prepare phosphine oxides from carboxylic acids is developed. Without the adjacent “anchoring atom”, the challenging C–P bond activation is achieved in high selectivity. The disclosure of this reaction provides a new example of C–P bond activation and helps to extend the understanding of the property of C–P bond.

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