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443923-77-1

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443923-77-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 443923-77-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,3,9,2 and 3 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 443923-77:
(8*4)+(7*4)+(6*3)+(5*9)+(4*2)+(3*3)+(2*7)+(1*7)=161
161 % 10 = 1
So 443923-77-1 is a valid CAS Registry Number.

443923-77-1Relevant articles and documents

From p-benzoquinone to cyclohexane chirons: First asymmetric synthesis of (+)-rengyolone and (+)- and (-)-menisdaurilide

Busque, Felix,Canto, Mariona,De March, Pedro,Figueredo, Marta,Font, Josep,Rodriguez, Sonia

, p. 2021 - 2032 (2007/10/03)

Starting from a common, easily available, enantiopure monoketal of p-benzoquinone, the synthesis of a large number of cyclohexane chirons has been achieved. The first synthesis of (+)-rengyolone and (+)- and (-)-menisdaurilide has been performed from one of these new building blocks. The wide variety of functional groups of this series of chirons makes them useful for subsequent synthetic processes.

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