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100183-86-6

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100183-86-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 100183-86-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,0,1,8 and 3 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 100183-86:
(8*1)+(7*0)+(6*0)+(5*1)+(4*8)+(3*3)+(2*8)+(1*6)=76
76 % 10 = 6
So 100183-86-6 is a valid CAS Registry Number.

100183-86-6Relevant articles and documents

Preparation of (7Z) - and (7Z,11Z) - Vitamin A

Soukup,Widmer

, p. 4117 - 4118 (2007/10/02)

An efficient access to (7Z)- and (7Z,11Z)-vitamin A is described. Following the addition of a C6-acetylenic building block to 2,6,6-trimethylcyclohexanone (2), dehydration of the tert. alcohol 3 and formation of the C15-Wittig salt, the (7Z)-geometry was introduced by partial hydrogenation of the triple bond over Raney-nickel. Following Wittig reaction with (E)-2-methyl-4-acetoxy-2-butenal gave a mixture of the title compounds 8 and 9 which could easily be separated.

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