Steroidal phenyl ketones were synthesised in high yields by palladium-catalysed carbonylation reactions of 17-iodo-androst-16-ene derivatives in the presence of NaBPh4 under mild reaction conditions. Alkenyl bromides or enol triflates gave lower yields in the same reaction.
The synthesis of novel 3 - and 17-diphenylphosphino-androstane derivatives via homogeneous catalytic P-C coupling is described. The products were characterized by H-1 and P-31 NMR measurements. According to the NMR investigation of the PtCl2P2-type complexes, the steroidal phosphines are trans-coordinated with respect to the Pt-centre exclusively.
Highly Efficient Synthesis of Steroidal Hydroxamic Acid Derivatives via Homogeneous Catalytic Carbonylation Reaction
Steroidal hydroxamic acidderivatives were synthesized in moderate to high yields by palladium-catalyzed carbonylation reactions of the corresponding iodo-alkenyl compounds or enol triflates in the presence of substituted hydroxylamines under mild reaction conditions. The effect of reaction parameters on the regioselectivity of carbonylation of N-substituted hydroxylamines is investigated in detail