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167887-40-3

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167887-40-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 167887-40-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,7,8,8 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 167887-40:
(8*1)+(7*6)+(6*7)+(5*8)+(4*8)+(3*7)+(2*4)+(1*0)=193
193 % 10 = 3
So 167887-40-3 is a valid CAS Registry Number.

167887-40-3Relevant articles and documents

Efficient entry to polysubstituted pyrrolizidines, indolizidines and quinolizidines via a sequential reaction process

Ma, Dawei,Zhu, Wei

, p. 1181 - 1184 (2007/10/03)

A sequential SN2-Michael addition-Michael addition reaction process between ω-iodo-α,β-alkynoates and δ- or γ-amino α,β-unsaturated esters is developed, which affords polysubstituted pyrrolizidines, indolizidines or quinolizidines in good yield

Enantioselective acylation of β-aminoesters using penicillin G acylase in organic solvents

Roche, Didier,Prasad, Kapa,Repic, Oljan

, p. 3665 - 3668 (2007/10/03)

The resolution of racemic β-aminoesters has been achieved through selective acylation catalyzed by Penicillin G Acylase (ChiroCLEC(TM)-EC). The method has been optimized using three different phenylacetyl donors, and the effect of solvents on the rate of reaction is described. The efficiency of our method is illustrated by the synthesis of five different β-aminoesters with high enantiomeric purities.

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