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127491-99-0

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127491-99-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127491-99-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,4,9 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 127491-99:
(8*1)+(7*2)+(6*7)+(5*4)+(4*9)+(3*1)+(2*9)+(1*9)=150
150 % 10 = 0
So 127491-99-0 is a valid CAS Registry Number.

127491-99-0Relevant articles and documents

The Cyclization Route to the Calcitriol A-ring: A Formal Synthesis of (+)-1α,25-Dihydroxyvitamin D3

Chen, Chen,Crich, David

, p. 7943 - 7954 (1993)

An efficient asymmetric synthesis of the A-ring of 1α,25-dihydroxyvitamin D3 from α-bromoacrolein is described.The key steps of the synthesis are the Evans type syn-selective asymmetric aldol reaction of bromoacrolein with the boron enolate of

Asymmetric total synthesis of an a-ring precursor to hormonally active 1α,25-dihydroxyvitamin D3

Posner,Kinter

, p. 3967 - 3969 (2007/10/02)

A new sulfinyl orthoester has been designed and used effectively in one-flask syntheses of dienoate esters from allylic alcohols; this new method as well as a highly stereocontrolled [2 + 4]-cycloaddition are applied to synthesis of 1α,25-dihydroxyvitamin D3.

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