Enantioselective Intermolecular C-H Functionalization of Allylic and Benzylic sp(3) C-H Bonds Using N-Sulfonyl-1,2,3-triazoles.
Enantioselective Intermolecular C-H Functionalization of Allylic and Benzylic sp(3) C-H Bonds Using N-Sulfonyl-1,2,3-triazoles.
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DOI:
10.1021/acs.orglett.6b01298
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发表时间:
2016-07-01
期刊:
影响因子:
5.2
通讯作者:
Davies HM
中科院分区:
文献类型:
--
作者:
Kubiak RW 2nd;Mighion JD;Wilkerson-Hill SM;Alford JS;Yoshidomi T;Davies HM
The enantioselective intermolecular sp3 C–H functionalization at allylic and benzylic positions was achieved using rhodium-catalyzed reactions with 4-phenyl-N-methanesulfonyl-1,2,3-triazole. The optimum dirhodium tetracarboxylate catalyst for these reactions was Rh2(S-NTTL)4. The rhodium-bound α-imino carbene intermediates preferentially reacted with tertiary over primary C–H bonds in good yields and moderate levels of enantioselectivity (66-82% ee). This work demonstrates that N-sulfonyltriazoles can be applied to the effective C–H functionalization at sp3 C–H bonds of substrates containing additional functionality.
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