Enantioselective Si-H Insertion Reactions of Diarylcarbenes for the Synthesis of Silicon-Stereogenic Silanes.
Enantioselective Si-H Insertion Reactions of Diarylcarbenes for the Synthesis of Silicon-Stereogenic Silanes.
复制标题
二元核烯烯类合成硅质生成硅烷的对映选择性Si-H插入反应。
DOI:
10.1021/jacs.0c04533
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发表时间:
2020-07-08
影响因子:
15
通讯作者:
Franz AK
中科院分区:
文献类型:
--
作者:
Jagannathan JR;Fettinger JC;Shaw JT;Franz AK
We report the first example of enantioselective, intermolecular diarylcarbene insertion into Si–H bonds for synthesis of silicon-stereogenic silanes. Dirhodium(II) carboxylates catalyze an Si–H insertion using carbenes derived from diazo compounds where selective formation of an enantioenriched silicon center is achieved using prochiral silanes. Fourteen prochiral silanes were evaluated with symmetrical and prochiral diazo reactants to produce a total of 25 novel silanes. Adding an ortho substituent on one phenyl ring of a prochiral diazo enhances enantioselectivity up to 95:5 er with yields up to 98 %. Using in situ IR spectroscopy, the impact of the off-cycle azine formation is supported based on the structural dependence for relative rates of diazo decomposition. A catalytic cycle is proposed where the Si–H insertion step is rate-determining, supported by kinetic isotope effect experiments. Transformations of an enantioenriched silane derived from this method, including selective synthesis of a novel sila-indane, are demonstrated.
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影响因子:
15
作者:
Bauer, Jonathan O.;Strohmann, Carsten
通讯作者:
Strohmann, Carsten
影响因子:
3.6
作者:
Diemoz, Kayla M.;Hein, Jason E.;Franz, Annaliese K.
通讯作者:
Franz, Annaliese K.
影响因子:
4
作者:
Kobayashi, K;Kato, T;Masuda, S
通讯作者:
Masuda, S
影响因子:
3.6
作者:
Koga, Shinya;Ueki, Shuhei;Nishihara, Hiroshi
通讯作者:
Nishihara, Hiroshi
DOI:
10.1126/science.aah6219
发表时间:
2016-11-25
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Kan SB;Lewis RD;Chen K;Arnold FH
通讯作者:
Arnold FH