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97634-53-2

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97634-53-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97634-53-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,6,3 and 4 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 97634-53:
(7*9)+(6*7)+(5*6)+(4*3)+(3*4)+(2*5)+(1*3)=172
172 % 10 = 2
So 97634-53-2 is a valid CAS Registry Number.

97634-53-2Relevant articles and documents

Synthetic Studies Directed toward Cembranolides. Synthesis of the Basic Nucleus of Crassin Acetate

Dauben, William G.,Saugier, R. Kent,Fleischhauer, Ilona

, p. 3767 - 3774 (2007/10/02)

A stereospecific synthesis of the basic crassin acetate nucleus, erythro-1-(hydroxymethyl)-14-hydroxy-4,8,12-trimethylcyclotetradeca-(E,E,E)-3,7,11-triene, has been achieved.Stereospecific syntheses of the two precursors to this ring system, (E,E)-3,7-dimethyl-9-(phenylthio)nona-3,7-dienal and (E)-2,8-bis(trimethylsiloxy)-2,7-dimethyloct-6-en-3-one, have been developed.These moieties were combined via an aldol condensation to yield erythro-9-hydroxy-10--1-(phenylthio)-14-(trimethylsiloxy)-3,7,13-trimethyltetradeca-(E,E,E)-2,6,12-triene which, in a series of reactions, was cyclized to the titled 14-membered ring system.

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