Enantioselective Syntheses of (-)-Alloyohimbane and (-)-Yohimbane by an Efficient Enzymatic Desymmetrization Process.
Enantioselective Syntheses of (-)-Alloyohimbane and (-)-Yohimbane by an Efficient Enzymatic Desymmetrization Process.
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DOI:
10.1002/ejoc.201601171
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发表时间:
2016-12
影响因子:
2.8
通讯作者:
Sarkar A
中科院分区:
文献类型:
--
作者:
Ghosh AK;Sarkar A
Enantioselective syntheses of (−)-alloyohimbane and (−)-yohimbane was accomplished in a convergent manner. The key step involved a modified mild protocol for the enantioselective enzymatic desymmetrization of meso-diacetate. The protocol provided convenient access to an optically active monoacetate in multi-gram scale in high enantiomeric purity. This monoacetate was converted to (−)-alloyohimbane. Reductive amination of the derived aldehyde causes the isomerization leading to the trans-product and allows the synthesis of (−)-yohimbane.
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