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124887-91-8

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124887-91-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 124887-91-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,4,8,8 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 124887-91:
(8*1)+(7*2)+(6*4)+(5*8)+(4*8)+(3*7)+(2*9)+(1*1)=158
158 % 10 = 8
So 124887-91-8 is a valid CAS Registry Number.

124887-91-8Relevant articles and documents

The highly syn-selective Michael reaction of enamines with 2-(1-alkenyl)-1,3-dioxolan-2-ylium cations generated from 2,2-dimethoxyethyl 2-alkenoates in situ

Machida,Hashimoto,Saigo,Inoue,Hasegawa

, p. 3737 - 3752 (2007/12/18)

2,2-Dimethoxyethyl 2-alkenoates are easily transformed into 2-(1-alkenyl)-1,3-dioxolan-2-ylium cations in situ on the action of titanium tetrachloride, which react with enamines to predominantly give syn Michael adducts in good yields. This is the first example of such a high syn-selectivity for the Michael reaction of α,β-unsaturated ester derivatives with ketone enolate equivalents.

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