Regioselective Carboindation of Simple Alkenes with Indium Tribromide and Ketene Silyl Acetals
作者:Yoshihiro Nishimoto、Hiroki Ueda、Yoshihiro Inamoto、Makoto Yasuda、Akio Baba
DOI:10.1021/ol1012108
日期:2010.8.6
The regioselective carboindation of simplealkenes with indium tribromide and ketene silyl acetals was accomplished. Various alkenes such as ethylene, 1-alkenes, and cyclic alkenes were applicable for this reaction system. The alkylindium product from the carboindation of cyclohexene revealed an anti addition mechanism.
Fe-catalyzed three-component dicarbofunctionalization of unactivated alkenes with alkyl halides and Grignard reagents
作者:Lei Liu、Wes Lee、Cassandra R. Youshaw、Mingbin Yuan、Michael B. Geherty、Peter Y. Zavalij、Osvaldo Gutierrez
DOI:10.1039/d0sc02127j
日期:——
reported. The reaction operates under fast turnover frequency and tolerates a diverse range of sp2-hybridized nucleophiles (electron-rich and electron-deficient (hetero)aryl and alkenyl Grignard reagents), alkyl halides (tertiary alkyl iodides/bromides and perfluorinated bromides), and unactivated olefins bearing diversefunctional groups including tethered alkenes, ethers, protected alcohols, aldehydes
Iridium-Catalyzed, Diastereoselective Dehydrogenative Silylation of Terminal Alkenes with (TMSO)<sub>2</sub>MeSiH
作者:Chen Cheng、Eric M. Simmons、John F. Hartwig
DOI:10.1002/anie.201304084
日期:2013.8.19
achieved under mild conditions with low catalyst loading. The diastereoselectivity of the reaction can be controlled by choosing the appropriate ancillary ligand (see scheme; coe=cyclooctene). The silylation products undergo further transformation such as oxidation or cross‐coupling.
α-C—H Alkylation of Methyl Sulfides with Alkenes by a Scandium Catalyst
作者:Yong Luo、Yuanhong Ma、Zhaomin Hou
DOI:10.1021/jacs.7b11245
日期:2018.1.10
addition of sulfides to alkenes is an atom-efficient route for the functionalization and modification of sulfide compounds through C-C bond formation, but this transformation is highly challenging. We report here the regioselective α-C(sp3)-H addition of a wide range of methyl sulfides to a variety of olefins and dienes by a half-sandwich scandium catalyst. This protocol provides a unique route for the synthesis
硫化物与烯烃的 CH 加成是通过形成 CC 键对硫化物化合物进行官能化和改性的一种原子有效途径,但这种转化极具挑战性。我们在这里报告了通过半夹心钪催化剂将多种甲基硫化物区域选择性地加成到各种烯烃和二烯中的 α-C(sp3)-H。该协议为通过在硫相邻碳原子上以 100% 原子效率的方式形成 CC 键来合成多种硫化物衍生物提供了独特的途径。
Asymmetric Hydrosilylation of 1-Alkenes Catalyzed by Palladium–MOP
Asymmetric hydrosilylation of simple terminal alkenes (RCH=CH2) with trichlorosilane at 40 °C in the presence of 1 × 10−3 or 1 × 10−4 molar amounts of palladium catalyst prepared in situ from [PdCl(η3-C3H5)]2 and (S)-2-diphenylphosphino-2′-methoxy-1,1′-binaphthyl ((S)-MeO-MOP) proceeded with unusual regioselectivity and with high enantioselectivity to give high yields of 2-(trichlorosilyl)alkanes together
在由 [PdCl(η3-C3H5)]2 原位制备的 1 × 10−3 或 1 × 10−4 摩尔量的钯催化剂存在下,简单末端烯烃 (RCH=CH2) 与三氯硅烷在 40 °C 的不对称氢化硅烷化(S)-2-二苯基膦基-2'-甲氧基-1,1'-联萘 ((S)-MeO-MOP) 以不寻常的区域选择性和高对映选择性进行,得到高产率的 2-(三氯甲硅烷基)烷烃少量的 1-(三氯甲硅烷基)烷烃。通过碳-硅键的氧化获得旋光醇,RCH(OH)CH3。相对于 1-甲硅烷基烷烃形成 2- 甲硅烷基烷烃的区域选择性和醇的对映体纯度如下:R = n-C4H9:89/11,94% ee (R)。R = n-C6H13:93/7 95% ee (R)。R = n-C10H21:94/6,95% ee (R)。R = Ph :81/19,97% ee (S)。R = Ph :80/20,92%