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133927-64-7

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133927-64-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133927-64-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,9,2 and 7 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 133927-64:
(8*1)+(7*3)+(6*3)+(5*9)+(4*2)+(3*7)+(2*6)+(1*4)=137
137 % 10 = 7
So 133927-64-7 is a valid CAS Registry Number.

133927-64-7Relevant articles and documents

Lanthanum(III) isopropoxide catalyzed chemoselective transesterification of dimethyl carbonate and methyl carbamates

Hatano, Manabu,Kamiya, Sho,Moriyama, Katsuhiko,Ishihara, Kazuaki

supporting information; experimental part, p. 430 - 433 (2011/04/15)

A practical transesterification of less reactive dimethyl carbonate and much less reactive methyl carbamates with primary (1°), secondary (2°), and tertiary (3°) alcohols was established with the use of a lanthanum(III) complex, which was prepared in situ from lanthanum (III) isopropoxide (3 mol %) and 2-(2-methoxyethoxy)ethanol (6 mol %). In particular, corresponding carbonates and carbamates obtained were of synthetic utility from the viewpoint of the selective protection and/or deprotection of 1°-, 2°-, and 3°-alcohols.

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