THE BROMINATION OF THE EPIMERIC 4,5-CYCLOPROPANOCHOLESTAN-3-ONES
Bromination of the epimeric 4,5-cyclopropanocholestan-3-ones I and XIII has been studied and structures of the products were established by chemical and spectral means.Confirmation of the A ring in the bromo ketones and bromohydrins is discussed on the basis of spectral evidence.
Fajkos, Jan,Joska, Jiri,Zajicek, Jaroslav
p. 3455 - 3473
(2007/10/02)
Bridged-ring steroids. II. The synthesis of bridged steroids with a bicycloheptane ring A system
Bridged steroids with a bicycloheptane ring A system are formed on thermolysis of 5-vinyl 3-keto steroids. 5-Vinyl-5α-cholestan-3-one (26) on being heated at 350 deg C in decalin gave 2α,5-(syn-methylmethano)-5α-cholestan-3-one (27).Similar treatme
Yates, Peter,Winnik, Francoise M.
p. 1641 - 1650
(2007/10/02)
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