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139177-23-4

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139177-23-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139177-23-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,1,7 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139177-23:
(8*1)+(7*3)+(6*9)+(5*1)+(4*7)+(3*7)+(2*2)+(1*3)=144
144 % 10 = 4
So 139177-23-4 is a valid CAS Registry Number.

139177-23-4Downstream Products

139177-23-4Relevant articles and documents

Synthesis of Tertiary Alcohols via the Use of the Allyldimethylsilyl Moiety as a Latent Hydroxyl Group in the Kumada-Fleming-Tamao Reaction

Magar, Sharad S.,Fuchs, P. L.

, p. 7513 - 7516 (1991)

The phenyldimethylsilyl to hydroxyl transformation fails in the cases where a cyclic tertiary carbon center is involved as was observed in the synthesis of phorbol C-ring models.An alternate functionality in the form of allyldimethylsilane (ADMS) is found to work well in these and other cases involving tertiary centers.With proper choice of reagents, the ADMS group can be employed as a latent alcohol in systems containing ketones, esters, arenes, and vinyl groups.

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