Trialkysilyl trifluoromethanesulfonate mediated functionalization of 4-aza-5alpha-androstan-3-one steroids
申请人:MERCK & CO. INC.
公开号:EP0473226A2
公开(公告)日:1992-03-04
A novel single-pot trialkylsilyl trifluoromethanesulfonate (R₃Si-OTf) mediated process produces derivatives of 4-aza 3-keto steroids at the α-methylenic carbon through electrophilic substitution. These derivatives are useful in the preparation, through elimination of the substituent on the α-methylene carbon, of Δ-l olefin 4-aza 3-keto steroids which are potent inhibitors of 5-α reductase.
A novel single-pot trialkylsilyl trifluoromethanesulfonate (R.sub.3 Si--OTf) mediated process produces derivatives of 4-aza 3-keto steroids at the .alpha.-methylenic carbon through electrophilic substitution. These derivatives are useful in the preparation, through elimination of the substituent on the .alpha.-methylene carbon, of .DELTA.-1 olefin 4-aza 3-keto steroids which are potent inhibitors of 5-.alpha. reductase.