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152982-56-4

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152982-56-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 152982-56-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,2,9,8 and 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 152982-56:
(8*1)+(7*5)+(6*2)+(5*9)+(4*8)+(3*2)+(2*5)+(1*6)=154
154 % 10 = 4
So 152982-56-4 is a valid CAS Registry Number.

152982-56-4Relevant articles and documents

Synthesis of (R)- and (S)-2,3-Methanovaline from (2S)-N-Benzoyl-2-tert-butyl-4-methylene-1,3-oxazolidin-5-one

Chinchilla, Rafael,Najera, Carmen,Garcia-Granda, Santiago,Menendez-Velazquez, Amador

, p. 5799 - 5802 (1993)

The reaction of (2S)-N-benzoyl-2-tert-butyl-4-methylene-1,3-oxazolidin-5-one (9) with isopropylidenetriphenylphosphorane at room temperature gives the corresponding cis and trans spirocyclopropane derivatives 10 in ca. 1:1 ratio.After separation of both diastereomers, by recrystallization and flasch chromatography, and further acid hydrolysis, enantiomerically pure (R)- and (S)-2,3-methanovaline 11 are obtained.

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