A convenient synthesis of 1α,25-dihydroxy-28-norvitamin D2
摘要:
The title compound was synthesized via the Julia olefination using ring B-diene protected 3-beta-hydroxy-23,24-bisnorchola-5,7-diene-22-al acetate and the side-chain synthon 2-methyl-4-phenylsulfonyl-2-(tetrahydropyranyloxy)butane. Ring B-deprotection, photolysis, Paaren-DeLuca hydroxylation and separation of the 5,6 E and Z stereoisomers completed the synthesis in overall 3% yield.
A convenient synthesis of 1α,25-dihydroxy-28-norvitamin D2
摘要:
The title compound was synthesized via the Julia olefination using ring B-diene protected 3-beta-hydroxy-23,24-bisnorchola-5,7-diene-22-al acetate and the side-chain synthon 2-methyl-4-phenylsulfonyl-2-(tetrahydropyranyloxy)butane. Ring B-deprotection, photolysis, Paaren-DeLuca hydroxylation and separation of the 5,6 E and Z stereoisomers completed the synthesis in overall 3% yield.
Bogoslovskii,N.A. et al., Journal of general chemistry of the USSR, 1978, vol. 48, p. 818 - 822
作者:Bogoslovskii,N.A. et al.
DOI:——
日期:——
Method For Preparing Indene Derivatives, And Intermediates For Preparation Of Derivatives
申请人:Toyoda Asako
公开号:US20090177002A1
公开(公告)日:2009-07-09
Indene derivatives that are utilizable as intermediates in the synthesis of the vitamin D
2
derivative paricalcitol, which is useful as pharmaceutical are efficiently prepared by subjecting a vitamin D
2
derivative such as 25-hydroxyvitamin D
2
to a two-steps oxidation reaction using an oxidizing agent such as potassium permanganates and sodium periodate in a suitable solvent such as methanol and ethanol.