Selective sp(3) C-H alkylation via polarity-match-based cross-coupling.
Selective sp(3) C-H alkylation via polarity-match-based cross-coupling.
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DOI:
10.1038/nature22813
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发表时间:
2017-07-06
期刊:
影响因子:
64.8
通讯作者:
MacMillan DWC
中科院分区:
文献类型:
--
作者:
Le C;Liang Y;Evans RW;Li X;MacMillan DWC
The functionalization of carbon–hydrogen (C–H) bonds is one of the most attractive strategies for molecular construction in organic chemistry. The hydrogen atom is considered to be an ideal coupling handle, owing to its relative abundance in organic molecules and its availability for functionalization at almost any stage in a synthetic sequence. Although many C–H functionalization reactions involve C(sp3)–C(sp2) coupling, there is a growing demand for C–H alkylation reactions, wherein sp3 C–H bonds are replaced with sp3 C–alkyl groups. Here we describe a polarity-match-based selective sp3 C–H alkylation via the combination of photoredox, nickel and hydrogen-atom transfer catalysis. This methodology simultaneously uses three catalytic cycles to achieve hydridic C–H bond abstraction (enabled by polarity matching), alkyl halide oxidative addition, and reductive elimination to enable alkyl–alkyl fragment coupling. The sp3 C–H alkylation is highly selective for the α-C–H of amines, ethers and sulphides, which are commonly found in pharmaceutically relevant architectures. This cross-coupling protocol should enable broad synthetic applications in de novo synthesis and late-stage functionalization chemistry.
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影响因子:
16.6
作者:
Chen, Xiao;Engle, Keary M.;Wang, Dong-Hui;Yu, Jin-Quan
通讯作者:
Yu, Jin-Quan
影响因子:
15
作者:
Zhang, Shu-Yu;Li, Qiong;Chen, Gong
通讯作者:
Chen, Gong
DOI:
10.1126/science.1255525
发表时间:
2014-07-25
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Zuo Z;Ahneman DT;Chu L;Terrett JA;Doyle AG;MacMillan DW
通讯作者:
MacMillan DW
DOI:
10.1126/science.aaf6635
发表时间:
2016-06-10
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Shaw MH;Shurtleff VW;Terrett JA;Cuthbertson JD;MacMillan DW
通讯作者:
MacMillan DW
影响因子:
62.1
作者:
Karkas, Markus D.;Porco, John A., Jr.;Stephenson, Corey R. J.
通讯作者:
Stephenson, Corey R. J.