Hexachloroacetone → 7alpha-Chloro-5,6beta-epoxy-15beta,16beta-methylen-3beta-pivaloyloxy-5beta-androstan-17-one

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 5,6β-epoxy-7β-hydroxy-15β,16β-methylen-3β-pivaloyloxy-5β-androstan-17-one (1.66 g, 0.004 mol) in dichloromethane (8 mL) is treated with hexachloroacetone (2 mL, 0.013 mol) and cooled to 0-2° C. Triphenylphosphine (1.53 g, 0.0044 mol) in dichloromethane (4 mL) is added dropwise and the mixture is stirred for one hour at 3-4° C., then for an additional hour at 10-15° C.

Herkunft & Nachweise