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138649-96-4

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138649-96-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138649-96-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,4 and 9 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 138649-96:
(8*1)+(7*3)+(6*8)+(5*6)+(4*4)+(3*9)+(2*9)+(1*6)=174
174 % 10 = 4
So 138649-96-4 is a valid CAS Registry Number.

138649-96-4Relevant articles and documents

Asymmetric synthesis of spirocyclic pyrrolidines and tetrahydrofurans by chiral aldol reactions and phenylthio migration

Chibale,Warren

, p. 6645 - 6648 (1991)

Highly enantioselective aldol reactions of the boron enolate of (S)-N-propionyl-4-(phenylmethyl)-2-oxazolidinone with α-phenylthio cycloalkanecarbaldehydes were achieved. Cyclisation of the chiral phenylthiosulphonamide and diols gave the title compounds in excellent yields and enantiomeric excess.

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