A convenient procedure for the synthesis of 3β-acetoxy-3′-chloro-5α-cholest-6-eno[7,6-d]-2′,3′-dihydro-1H-pyrrole (4), 3β,3′-dichloro-5αcholest-6 eno[7,6-d]-2′,3′-dihydro-1H-pyrrole, (5) and 3′-chloro-5α-cholest-6-eno[7,6-d]-2′,3′-dihydro-1H-pyrrole (6) has been made from steroidal oximes (1-3) under refluxing conditions. The structural assignment of the products was confirmed on the basis of IR, 1H NMR, 13C NMR, MS and analytical data.
Key words: Steroidal oxime, hydroxylamine, dihydropyrrole, vinyl chloride.
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