408535-75-1

Upstream product

• 408535-67-1 (3S,5R)-3,5-bis-t-butyldimethylsilyloxy-2-ethenyl-1-ethynylcyclohex-1-ene 
• 408535-68-2 (3S,5S)-3,5-bis-t-butyldimethylsilyloxy-2-bromo-1-cyclohexanone 
• 408535-74-0 (3R,3aR,7aR)-7-[(3S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-2-vinyl-cyclohex-1-enylethynyl]-3-((R)-1,5-dimethyl-5-trimethylsilanyloxy-hexyl)-3a-methyl-2,3,3a,4,5,7a-hexahydro-1H-indene 

Relevant academic research and scientific papers

An 8pi electron electrocyclization leading to a 9,19-methano-bridged analogue of 1 alpha,25-dihydroxyvitamin D3.

[reaction: see text] Lindlar semihydrogenation of a vitamin D type trienyne leads spontaneously to 9 alpha,19-methano-1 alpha,25-dihydroxyvitamin D3. The intermediate tetraene resulting from the reduction undergoes a rapid, stereoselective 8pi electron el