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84403-55-4

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84403-55-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84403-55-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,4,0 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 84403-55:
(7*8)+(6*4)+(5*4)+(4*0)+(3*3)+(2*5)+(1*5)=124
124 % 10 = 4
So 84403-55-4 is a valid CAS Registry Number.

84403-55-4Relevant articles and documents

A mild and practical method for deprotection of aryl methyl/benzyl/allyl ethers with HPPh2andtBuOK

Pan, Wenjing,Li, Chenchen,Zhu, Haoyin,Li, Fangfang,Li, Tao,Zhao, Wanxiang

supporting information, p. 7633 - 7640 (2021/09/22)

A general method for the demethylation, debenzylation, and deallylation of aryl ethers using HPPh2andtBuOK is reported. The reaction features mild and metal-free reaction conditions, broad substrate scope, good functional group compatibility, and high chemical selectivity towards aryl ethers over aliphatic structures. Notably, this approach is competent to selectively deprotect the allyl or benzyl group, making it a general and practical method in organic synthesis.

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