An organocatalytic asymmetric chlorolactonization.

An organocatalytic asymmetric chlorolactonization.
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DOI:
10.1021/ja100502f
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发表时间:
2010-03-17
影响因子:
15
通讯作者:
Borhan, Babak
Borhan, Babak
中科院分区:
化学1区
文献类型:
--
作者:
Whitehead, Daniel C.;Yousefi, Roozbeh;Jaganathan, Arvind;Borhan, Babak

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发展了一种试剂控制的有机催化不对称氯内酯化反应。几种4-芳基戊烯酸在0.1当量的(DHQD)2 PHAL的存在下环化,采用各种N-氯代乙内酰脲作为末端异戊烯源。提出了10个实例,选择性范围从43到90%ee。这项工作代表了第一个实例的对映选择性试剂控制的氯内酯化,方法合成有用的对映选择性。
A reagent controlled organocatalytic enantioselective chlorolactonization reaction has been developed. Several 4-aryl pentenoic acids were cyclized in the presence of 0.1 equiv of (DHQD)2PHAL, employing variousN-chlorinated hydantoins as the terminal chlorenium source. Ten examples are presented with selectivities ranging from 43 to 90%ee. This work represents the first example of an enantioselective reagent-controlled chlorolactonization that approaches synthetically useful enantioselectivities.
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