Kaneko,H. et al., Chemical and pharmaceutical bulletin, 1963, vol. 11, # 2, p. 264 - 265
作者:Kaneko,H. et al.
DOI:——
日期:——
Conformation of ring A in some 2β-methyl- and 2β-acetoxy-19-nortestosterones
作者:Y. Yamato、H. Kaneko
DOI:10.1016/s0040-4020(01)93905-5
日期:1965.1
2β-methyl-19-norsteroids are described. By means of optical rotatory dispersion and NMR spectroscopy it is shown that the introduction of 2β-methyl and 2β-acetoxy substituents into 19-nortestosterones changes the normal half chair conformational of A ring to a twist form as cited in the cholestane series.