188905-90-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 188905-90-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,8,9,0 and 5 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 188905-90:
(8*1)+(7*8)+(6*8)+(5*9)+(4*0)+(3*5)+(2*9)+(1*0)=190
190 % 10 = 0
So 188905-90-0 is a valid CAS Registry Number.
188905-90-0Relevant articles and documents
Mild, selective deprotection of PMB ethers with triflic acid/1,3-dimethoxybenzene
Jung, Michael E.,Koch, Pierre
supporting information; experimental part, p. 6051 - 6054 (2011/11/28)
An efficient method for the cleavage of the p-methoxybenzyl protecting group of several alcohols in the presence of 0.5 equiv of trifluoromethanesulfonic acid and 1,3-dimethoxybenzene in dichloromethane at room temperature is described.
