Tin(<scp>II</scp>) chloride dihydrate–a mild reagent for the transformation of 6-nitro-Δ<sup>5</sup>-steroids to 5α-hydroxy-6-ketosteroids
作者:Gireesh M. Singhal、Nalin B. Das、Ram P. Sharma
DOI:10.1039/c39900000498
日期:——
Reaction of excess hydrated tin(II) chloride with 6-nitro-Î5-steroids (1aâg) and (5) in tetrahydrofuran furnishes 5α-hydroxy-6-ketosteroids (2aâg) and (6) respectively, in good yields.
Reaction of nitro-alkenes with iodotrimethylsilane: a new method for the conversion of vinyl nitrosteroids to ketosteroids
作者:Gireesh M. Singhal、Nalin B. Das、Ram P. Sharma
DOI:10.1039/c39890001470
日期:——
Iodotrimethylsilane generated in situ from chlorotrimethylsilane and sodium iodide effects the reduction of nitro-alkenes (1a–e) and (5) at –5 to 0 °C to furnish the ketones (2a–e) and (6) respectively as the major products.