Stereospecificity in the photoisomerization of steroidal α-ketols to lactones
作者:Shirley Stiver、Peter Yates
DOI:10.1016/s0040-4039(01)81366-6
日期:1984.1
The photoisomerization of 5-hydroxy-6-cholestanones to lactones involves ketene intermediates formed by migration of H-7α; its stereospecificity is independent of hydrogen bonding and is attributed to slowing of rotation about the C-9 – C-10 bond in the alkyl acyl diradicals that are the ketene precursors.
YATES, PETER;STIVER, SHIRLEY, CAN. J. CHEM., 66,(1988) N 3, 476-486
作者:YATES, PETER、STIVER, SHIRLEY
DOI:——
日期:——
STIVER, SHIRLEY;YATES, PETER, CAN. J. CHEM., 66,(1988) N 2, 214-226
作者:STIVER, SHIRLEY、YATES, PETER
DOI:——
日期:——
Stiver, Shirley; Yates, Peter, Canadian Journal of Chemistry, 1988, vol. 66, p. 214 - 226
作者:Stiver, Shirley、Yates, Peter
DOI:——
日期:——
Synthesis of Some Five- and Six-Membered Oxasteroids of Cholestane Series by Ring Contraction and the Mass Spectrometric Fragmentations of Oxasteroids
作者:Hiroshi Suginome、Shinji Yamada
DOI:10.1246/bcsj.60.2453
日期:1987.7
Synthesis of several new five- and six-membered oxasteroids of the cholestane series by the ring contraction of those oxasteroids whose oxygen-containing ring is larger by one member has been achieved. Ring contraction utilizes a series of reactions recently developed by us for the transformation of cyclic ketones into cyclic ethers; it involves a regioselective β-scission of the alkoxyl radical generated