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137105-43-2

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137105-43-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137105-43-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,1,0 and 5 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137105-43:
(8*1)+(7*3)+(6*7)+(5*1)+(4*0)+(3*5)+(2*4)+(1*3)=102
102 % 10 = 2
So 137105-43-2 is a valid CAS Registry Number.

137105-43-2Relevant articles and documents

4-Pivaloylaminobenzyl ether, a new temporary protection for hydroxyl functions

Fukase, Koichi,Yoshimura, Takuya,Hashida, Manabu,Kusumoto, Shoichi

, p. 4019 - 4022 (2007/10/02)

4-Pivaloylaminobenzyl (PAB) group is a new benzyl-type protecting group which can be introduced either by initial introduction of 4-nitrobenzyl group followed by reduction and N-acylation or by the reaction of a hydroxyl compound with the corresponding halogenide or trichloroacetimidate. PAB ethers have higher acid stability than 4-methoxybenzyl ethers but are readily cleaved with DDQ in a manner similar to the latter.

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