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88738-41-4

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88738-41-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 88738-41-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,7,3 and 8 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 88738-41:
(7*8)+(6*8)+(5*7)+(4*3)+(3*8)+(2*4)+(1*1)=184
184 % 10 = 4
So 88738-41-4 is a valid CAS Registry Number.

88738-41-4Relevant articles and documents

Cleavage of MEM ethers by tetrahalozincate reagents

Herbert, John M.,Knight, Julian G.,Sexton, Brian

, p. 15257 - 15266 (2007/10/03)

A modification of the zinc halide-mediated removal of the MEM group is described. By the expedient of adding two molar equivalents of ethereal hydrogen chloride or of lithium halide, the method is extended to substrates which otherwise chelate the zinc reagent without undergoing deprotection. The compatibility of the resulting reagent Systems with other functional groups is demonstrated, and examples are presented where deprotection of mono-MEM-protected 1,2- and 1,3-diols can be carried out, avoiding the cyclisation which occurs normally.

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