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98758-86-2

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98758-86-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98758-86-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,7,5 and 8 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 98758-86:
(7*9)+(6*8)+(5*7)+(4*5)+(3*8)+(2*8)+(1*6)=212
212 % 10 = 2
So 98758-86-2 is a valid CAS Registry Number.

98758-86-2Relevant articles and documents

A General Method for the Synthesis of 3,5-Cyclovitamin D3 and Derivatives. A Stereoselective Synthesis of Vitamin D3

Nemoto, Hideo,Wu, Xiao-Ming,Kurobe, Hiroshi,Minemura, Kayoko,Ihara, Masataka,at. al.

, p. 1185 - 1190 (2007/10/02)

A stereoselective synthesis of vitamin D3 (1) was achieved via 3,5-cyclovitamin D3 (33) which was synthesized from the chiral aldehyde (3) and the vinyl bromide (27) derived from Grundmann's ketone (25). (+/-)-(Z)-5-(2-Cyclohexylidene-ethylidene)-4-methylenecyclohexane-r-1, t-3-diol (24) as a model compound of 1α-hydroxyvitamin D3 was also stereoselectively synthesized via the solvolysis of (+/-)-α-cyclohexylidenemethyl-3β-methoxymethoxy-2-methylenebicyclohexane-1-methanol (21) which was prepared from the aldehyde (12) and the organostannane (16).

SYNTHETIC STUDIES TOWARD TO 1α-HYDROXYVITAMIN D3 --- STEREOSELECTIVE SYNTHESIS OF (+/-)-(Z)-2-(3β,5α-DIHYDROXY-2-METHYLENECYCLOHEXYLIDENE)ETHYLIDENECYCLOHEXANE

Nemoto, Hideo,Wu, Xiao-Ming,Kurobe, Hiroshi,Ihara, Masataka,Fukumoto, Keiichiro

, p. 4257 - 4260 (2007/10/02)

As a model experiment for a synthesis of 1α-hydroxyvitamin D3, the title compound (19) was stereoselectively synthesized via the solvolysis of (+/-)-2-hydroxy-2-hexane)-1>ethylidenecyclohexane (15).

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