Cas 142095-82-7,3β-Dimethyltrifluormethansulfonylsiloxy-5-androsten-17-on

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Check Digit Verification of cas no

The CAS Registry Mumber 142095-82-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,0,9 and 5 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 142095-82:
(8*1)+(7*4)+(6*2)+(5*0)+(4*9)+(3*5)+(2*8)+(1*2)=117
117 % 10 = 7
So 142095-82-7 is a valid CAS Registry Number.

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142095-82-7Relevant academic research and scientific papers

The Trifluoromethanesulfonates of Dimethylsilyl Ethers as Intermediates for Silicon Protective Groups

Weinzierl, Uwe,Seidel, Wolfgang

, p. 369 - 372 (1992)

The reaction of mesityldimethylsilyl ethers with CF3SO3H yields selectively mesitylene.The resulting Si-trifluormethanesulfonates were reacted with t-BuLi to give the corresponding t-BuMe2Si-ethers.Keywords: Alcohol protective groups; t-Butyldimethylsilyl ethers; Mesityldimethylsilyl ethers; Trifluormethanesulfonates.

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