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20125-66-0

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20125-66-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20125-66-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,1,2 and 5 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 20125-66:
(7*2)+(6*0)+(5*1)+(4*2)+(3*5)+(2*6)+(1*6)=60
60 % 10 = 0
So 20125-66-0 is a valid CAS Registry Number.

20125-66-0Relevant articles and documents

Solvent-modulated Pd/C-catalyzed deprotection of silyl ethers and chemoselective hydrogenation

Ikawa, Takashi,Hattori, Kazuyuki,Sajiki, Hironao,Hirota, Kosaku

, p. 6901 - 6911 (2004)

Recently we have reported undesirable and frequent deprotection of the TBDMS protective group of a variety of hydroxyl functions occurred under neutral and mild hydrogenation conditions using 10% Pd/C in MeOH. The deprotection of silyl ethers is susceptible to significant solvent effect. TBDMS and TES protecting groups were selectively cleaved in the presence of acid-sensitive functional groups such as TIPS ether, TBDPS ether and dimethyl acetal under hydrogenation condition using 10% Pd/C in MeOH. In contrast, chemoselective hydrogenation of reducible functional groups such as acetylene, olefin and benzyl ether, proceeds in the presence of TBDMS or TES ethers in AcOEt or MeCN.

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