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133768-71-5

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133768-71-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133768-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,7,6 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133768-71:
(8*1)+(7*3)+(6*3)+(5*7)+(4*6)+(3*8)+(2*7)+(1*1)=145
145 % 10 = 5
So 133768-71-5 is a valid CAS Registry Number.

133768-71-5Upstream product

133768-71-5Downstream Products

133768-71-5Relevant articles and documents

Practical route to a new class of LTD4 receptor antagonists

Larsen, Robert D.,Corley, Edward G.,King, Anthony O.,Carroll, James D.,Davis, Paul,Verhoeven, Thomas R.,Reider, Paul J.,Labelle, Marc,Gauthier, Jacques Y.,Xiang, Yi Bin,Zamboni, Robert J.

, p. 3398 - 3405 (2007/10/03)

A general approach to the synthesis of a new class of LTD4 antagonists is presented. The key diarylpropane framework was prepared by Claisen-Schmidt condensation and selective reduction of the enone. Depending on the bridge to the 7-chloroquinaldine moiety, alkylation or Heck coupling methodology was developed. The chiral sulfides were introduced by asymmetric reduction of the diarylpropanone intermediates and subsequent inversion of the chiral center.

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