Synthesis of corticoids from 9.alpha.-hydroxyandrost-4-ene-3,17-dione
摘要:
The synthesis of 17-alpha,21-bis(acetyloxy)-16-beta-methylpregna-4,9(11)-diene-3,20-dione (24) from the sterol-derived 9-alpha-hydroxyandrost-4-ene-3,17-dione (1) has been completed. The key steps in the synthesis are 16-beta-methylation and conversion of the 17-ketone to 17-beta-cyanohydrin 11. Elaboration of 11 to 9-alpha-hydroxy-16-beta-methylpregn-4-ene-3,20-dione (15) followed by 21-acetoxylation and simultaneous introduction of 9,11-unsaturation and 17-alpha-acetoxylation gave 24.
Synthesis of corticoids from 9.alpha.-hydroxyandrost-4-ene-3,17-dione
作者:Nicholas I. Carruthers、Sohaila Garshasb、Andrew T. McPhail
DOI:10.1021/jo00029a032
日期:1992.1
The synthesis of 17-alpha,21-bis(acetyloxy)-16-beta-methylpregna-4,9(11)-diene-3,20-dione (24) from the sterol-derived 9-alpha-hydroxyandrost-4-ene-3,17-dione (1) has been completed. The key steps in the synthesis are 16-beta-methylation and conversion of the 17-ketone to 17-beta-cyanohydrin 11. Elaboration of 11 to 9-alpha-hydroxy-16-beta-methylpregn-4-ene-3,20-dione (15) followed by 21-acetoxylation and simultaneous introduction of 9,11-unsaturation and 17-alpha-acetoxylation gave 24.