Dannenberg,H. et al., Justus Liebigs Annalen der Chemie, 1960, vol. 636, p. 74 - 87
作者:Dannenberg,H. et al.
DOI:——
日期:——
Potentially carcinogenic cyclopenta[a]phenanthrenes (1,2-cyclopentenophenanthrenes). Part II. Derivatives containing further unsaturation in ring D
作者:M. M. Coombs
DOI:10.1039/j39660000963
日期:——
the Δ15– 17H-compound (A), but at 100° the Δ16– 15H-isomer was formed. Base-catalysed condensation of (A) with acetone and aryl aldehydes yielded 17-substituted-methylene derivatives. The chemical shifts of protones attached to ringD in these compounds are listed.