88944-55-2

Upstream product

• 103-71-9 phenyl isocyanate 
• 88924-32-7 (S)-2-((R)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-6-methoxymethoxy-6-methyl-hept-4-yn-3-one 
• 88924-30-5 (S)-2-((R)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-6-methoxymethoxy-6-methyl-hept-4-yn-3-ol 
• 88924-30-5 (2S,3R)-2-((R)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-6-methoxymethoxy-6-methyl-hept-4-yn-3-ol 
• 88924-30-5 (2S,3S)-2-((R)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-6-methoxymethoxy-6-methyl-hept-4-yn-3-ol 

Relevant academic research and scientific papers

STUDIES ON THE SYNTHESIS OF SIDE CHAIN HYDROXYLATED METABOLITES OF VITAMIN D. STEREOSPECIFIC SYNTHESES OF 25-HYDROXY-7,8-DIHYDROERGOSTEROL AND ITS C-24 EPIMER

An efficient, stereospecific synthesis of 25-hyroxy-7,8-dihydroergosterol, starting from the aldehyde 3 (7 steps, 30percent overall) was developed.Key steps are the stereospecific displacement of an allylic carbamate by Li2Cu3(CH3)5 and the stereoselectiv