¹H and ¹³C NMR characteristics of synthetic derivatives of steroid sapogenins: Part III. 16β,23:23,26-Diepoxy side chains

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• 作者：Ignacio Vá ; zquez-Ram&#xed ; rez ; Mariana Mac&#xed ; as-Alonso ; Rafael O. Arcos-Ramos ; Karen M. Ru&#xed ; z-Pé ; rez ; Diana O. Solano-Ram&#xed ; rez ; Mart&#xed ; n A. Iglesias Arteaga
• 关键词：NMR ; ¹H ; ¹³C ; COSY ; HetCor ; NOESY ; 23-Oxosapogenins ; 16β ; 23 ; 23 ; 26-Diepoxy-coprostanes
• 刊名：Steroids
• 出版年：2008
• 期刊代码：142_0039128x
• 类别：bio
• 出版时间：July 2008
• 卷：73
• 期：6
• 页码：642-651
• 文件大小：1508 K

摘要

The full assignments of the ¹H and ¹³C NMR signals of steroids bearing the 16β,23:23,26-diepoxy side chain are provided. Differentiation of the diasterotopic H-26 pair was achieved with the aid of NOESY experiments. The main substituent and steric effects associated with this moiety and their influence on the chemical shifts of the neighboring atoms are discussed.