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109761-31-1

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109761-31-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109761-31-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,6 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109761-31:
(8*1)+(7*0)+(6*9)+(5*7)+(4*6)+(3*1)+(2*3)+(1*1)=131
131 % 10 = 1
So 109761-31-1 is a valid CAS Registry Number.

109761-31-1Relevant articles and documents

Total regioselective control of tartaric acid

Spengler, Jan,Fernandez-Llamazares, Ana I.,Ruiz-Rodriguez, Javier,Burger, Klaus,Albericio, Fernando

supporting information; scheme or table, p. 5746 - 5749 (2010/10/20)

An efficient strategy to synthesize tartaric acid building blocks for totally regioselective transformations or derivatizations was disclosed. Starting from l-tartaric acid or l-dimethyl tartrate, respectively, we obtained type I and II building blocks with orthogonal sets of protecing groups (4-8 steps, 38-56% overall yield).

An Efficient O-Monoalkylation of Dimethyl L-Tartrate via O-Stannylene Acetal with Alkyl Halides in the Presence of Cesium Fluoride

Nagashima, Nobuo,Ohno, Masaji

, p. 141 - 144 (2007/10/02)

Selective O-monoalkylation of the vic-glycol of dimethyl L-tartrate with alkyl halides has been found to take place smoothly under mild conditions in the presence of cesium fluoride.

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