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267244-45-1

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267244-45-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 267244-45-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,7,2,4 and 4 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 267244-45:
(8*2)+(7*6)+(6*7)+(5*2)+(4*4)+(3*4)+(2*4)+(1*5)=151
151 % 10 = 1
So 267244-45-1 is a valid CAS Registry Number.

267244-45-1Relevant articles and documents

Parallel synthesis of novel heteroaromatic acromelic acid analogues from kainic acid

Baldwin,Fryer,Pritchardt

, p. 2588 - 2596 (2007/10/03)

A range of new C-4 heteroaromatic acromelic acid analogues has been synthesized in a parallel fashion from (-)-α-kainic acid 1. Protection of the amine and carboxylate groups of 1 followed by ozonolysis gave methyl ketone 8. A silyl enol ether 9, generated regiospecifically from the methyl ketone 8 using "kinetic" conditions, was brominated in situ with phenyltrimethylammonium perbromide to give the key α-bromo ketone 10. Parallel cyclization reactions of bromo ketone 10 with thioamides and thioureas were then performed. The aromatic heterocyclic derivatives 11a-d and 19 produced were deprotected to give the new kainoid amino acids 6a-d and 25 in excellent yield. Compounds 6a and 6c show strong binding to the kainate receptor. Reaction of 10 with alternative condensing agents was also briefly investigated.

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