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Steroids, systemic

In steroid systems, the homoannular diene in ring A and the heteroannular diene in AB rings are generated. The allylic 3a-carbonate 514 affords the homoannular conjugated diene 515 as a main product and a small amount of the heteroannular diene 516. On the other hand, the heteroannular conjugated diene 516 is obtained exclusively from 33-carbonates 517. The elimination reaction proceeds smoothly at room temperature. [Pg.359]

An extensive study of the A" -3-keto steroid system reveals a number of selective exchange reactions. For example, under controlled conditions in the presence of a strong acid catalyst such as deuterium chloride, it is... [Pg.154]

INTRODUCTION OF DOUBLE BONDS INTO THE STEROID SYSTEM... [Pg.265]

See other pages where Steroids, systemic is mentioned: [Pg.421] [Pg.145] [Pg.147] [Pg.149] [Pg.151] [Pg.153] [Pg.155] [Pg.157] [Pg.159] [Pg.161] [Pg.163] [Pg.165] [Pg.167] [Pg.169] [Pg.171] [Pg.173] [Pg.175] [Pg.177] [Pg.179] [Pg.181] [Pg.183] [Pg.185] [Pg.187] [Pg.189] [Pg.191] [Pg.193] [Pg.195] [Pg.197] [Pg.199] [Pg.201] [Pg.203] [Pg.205] [Pg.207] [Pg.209] [Pg.211] [Pg.213] [Pg.215] [Pg.217] [Pg.219] [Pg.221] [Pg.267] [Pg.269] [Pg.271] [Pg.273] [Pg.275] [Pg.277] [Pg.279] [Pg.281]

See also in sourсe #XX -- [ Pg.288 , Pg.345 ]

See also in sourсe #XX -- [ Pg.288 , Pg.345 ]

See also in sourсe #XX -- [ Pg.288 , Pg.345 ]