91874-90-7

Upstream product

• 51883-25-1 25-hydroxy-28-norvitamin D₂ 
• 143520-71-2 (E)-(R)-6-{(1R,3aS,7aR)-4-[(R)-2-Methoxy-2-(2-methylene-bicyclo[3.1.0]hex-1-yl)-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-2-methyl-hept-4-en-2-ol 
• 28421-56-9 3β-acetoxy-5α,8α-(4-phenyl-1,2,4-triazolidine-3,5-dione-1,2-diyl)ergosta-6,22-diene 
• 28421-57-0 3-acetoxy-2'-phenyl-[1,2,4]triazolo[1',2':6,7](6,7-diaza-5,8-etheno-23,24-dinor-cholane)-21,3',5'-trione 
• 143520-72-3 Toluene-4-sulfonic acid (S)-3-[2-[(1R,3aS,7aR)-1-((E)-(R)-5-hydroxy-1,5-dimethyl-hex-2-enyl)-7a-methyl-octahydro-inden-(4E)-ylidene]-eth-(Z)-ylidene]-4-methylene-cyclohexyl ester 
• 143520-73-4 (S)-1-{(R)-2-[(1R,3aS,7aR)-1-((E)-(R)-5-Hydroxy-1,5-dimethyl-hex-2-enyl)-7a-methyl-octahydro-inden-(4E)-ylidene]-1-methoxy-ethyl}-2-methylene-bicyclo[3.1.0]hexan-3-ol 
• 66513-97-1 cholesta-5,7,22-triene-3β,25-diol 
• 1108-03-8 ergosterol acetate 
• 91874-90-7 5,6-cis- and 5,6-trans-1α,25-dihydroxy-28-norvitamin D₂ 

Relevant academic research and scientific papers

A CONVENIENT SYNTHESIS OF 1α,25-DIHYDROXY-28-NORVITAMIN-D2

The title compound was synthesized via the Julia olefination using ring B-diene protected 3β-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, photoly