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Synthesis of the Enantiomer of 1alfa,25-Dihydroxy Vitamin D3(calcitrol) and a Diastereomer of 1alfa,25-Dihydroxy Vitamin D3, Differing from Natural Product in Configuratoion at All but One Asymmetric Carbon Atoms

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Convergent synthesis of ent-1alfa,25-dihydroxyvitamin D3 (ent-calcitriol, 2) and (1S,3S, 13S,14S,17S,20S) - 1alfa,25-dihydroxyvitamin D3 (5) using the ring A building blocks, 6 and 7, respectively, and rings CD building block8, is described. Building block 6 was obtained starting from vitamin D3 via dihydroxylation of the C7-C8 double bond, Mitsunobu inversion at C3, diastereoselective hydroxylation at C1 and cleavage of the C7-C8 bond. Building block 7 was prepared from known synthetic intermediate, 16a(1R,3S) via benzylation of the primary hydroxy group, mono-deprotection of bis-silyl ether 16b and Mitsunobu inversion of the configuration at C3 in 19. Synthetic building blocks were combined using Julia-Kocienski olefination reaction. Key words:Vitamins D, convergent synthesis, Mitsunobu reaction, olefination reaction
Słowa kluczowe
Rocznik
Strony
413--428
Opis fizyczny
Bibliogr. poz. 40
Twórcy
  • Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warszawa 42, Poland
  • Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warszawa 42, Poland
autor
  • Institute of Organic Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warszawa 42, Poland
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ3-0002-0012
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