Stereochemically versatile synthesis of the C1-C12 fragment of tedanolide C.

Stereochemically versatile synthesis of the C1-C12 fragment of tedanolide C.
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泰那内酯 C 的 C1-C12 片段的立体化学通用合成。

DOI:
10.1021/ol300194x
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发表时间:
2012
期刊:
影响因子:
5.2
通讯作者:
Daub,MaryE
Daub,MaryE
中科院分区:
化学1区
文献类型:
--
作者:
Smith,ThomasE;Fink,SarahJ;Levine,ZebulonG;McClelland,KeraniA;Zackheim,AdrianA;Daub,MaryE

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以2-甲基-2,4-戊二醛为起始原料,通过8步合成了泰德内酯C的C1-C12片段。1,3-二烯的不对称氢甲酰化可以在完全控制催化剂的情况下产生C10外映体。异丁基β-酮酯双对映选择性加成到α,β-二取代手性醛,在安装双甲基单元的同时设定C5立体化学。异步-1,3-二醇的差动保护作为高效的单锅操作进行。
A flexible synthesis of the C1–C12 fragment of Tedanolide C has been accomplished in eight steps from 2-methyl-2,4-pentadienal. Asymmetric hydroformylation of a 1,3-diene allows for the late-stage generation of either C10 epimer with complete catalyst control. Diastereoselective addition of an isobutyryl β-ketoester dianion to an α,β-disubstituted chiral aldehyde sets the C5 stereochemistry while installing the geminal dimethyl unit. Differential protection of asyn-1,3-diol is performed as a highly efficient single-pot operation.