• Syed Shafi

      Articles written in Journal of Chemical Sciences

    • Chemical methods for the conversion of Prednisolone to 11-𝛽-hydroxy-1,4-androstadiene-3,17-dione

      Pinnama Reddy Surya Pratap Syed Shafi Fatima Naaz Nayakanti Devanna

      More Details Abstract Fulltext PDF

      Several microbial transformations of steroids to 17-keto cortisones through side chain cleavage have been presented in the literature; however, yields and product selectivity in these methods were low. In the present study, some new methods have been identified for the side chain cleavage of prednisolone (1) to form 11-𝛽-hydroxy-1,4-androstadiene-3,17-dione (11-𝛽-hydroxy ADD). Prednisolone upon reaction with zinc chloride in dry THF results in the formation of cleavage product in good yield (76%). 11-𝛽-hydroxy ADD (2) has been formed in moderate yield (60%) under the Reformatsky reaction conditions by reacting with zincate. While performing the Wittig reaction using stable ylides, again results in the formation of compound 2 in good yield (56%). Side chain cleavage of prednisolone was confirmed from the physical and analytical data and similar when compared with the literature reports.

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