Copper-Catalyzed Asymmetric Cyanation of Alkenes via Carbonyl-Assisted Coupling of Alkyl-Substituted Carbon-Centered Radicals
作者:Song Zhou、Guoyu Zhang、Liang Fu、Pinhong Chen、Yibiao Li、Guosheng Liu
DOI:10.1021/acs.orglett.0c02085
日期:2020.8.21
the first copper-catalyzed asymmetric cyanation of alkyl-substituted alkenes has been developed. The reaction, featuring mild reaction conditions and excellent functional group compatibilities, provides an easy access to a wide array of structurally diverse enantioenriched alkyl nitriles in good yields. Notably, an unstable carbon-centered radical generated by trifluoromethyl radical addition across terminal
The Synthesis of Butenamides and Thiobutenamide by an Organosamarium Reagent†
作者:Mingxin Yu、Yongmin Zhang、Cangtao Qian
DOI:10.1039/a708538i
日期:——
An organosamarium reagent reacts with isocyanates (or isothiocyanate) to afford butenamides (or thiobutenamide) in THF.
有机钐试剂与异氰酸酯(或异硫氰酸盐)反应,在 THF 中生成丁烯酰胺(或硫代丁烯酰胺)。
Regio- and Enantioselective Hydroalkylations of Unactivated Olefins Enabled by Nickel Catalysis: Reaction Development and Mechanistic Insights
作者:Peng-Fei Yang、Lei Zhu、Jian-Xing Liang、Han-Tong Zhao、Jian-Xin Zhang、Xian-Wang Zeng、Qin Ouyang、Wei Shu
DOI:10.1021/acscatal.2c00665
日期:——
stereoselective hydrometalation of unactivatedalkenes with a nontrivial Markovnikov selectivity, followed by the cross-coupling with unactivated alkyl electrophiles to access trialkyl tertiary saturated stereogenic centers not adjacent to activating groups. The mild and robust conditions enable the use of terminal and internal unactivatedalkenes and unactivated primary and secondary alkyl, benzyl
Ni-Catalyzed Reductive 1,2-Cross-Dialkylation of Unactivated Alkenes with Two Alkyl Bromides
作者:Jian-Xin Zhang、Wei Shu
DOI:10.1021/acs.orglett.2c01416
日期:2022.6.3
Cross-dialkylation of unactivatedalkenes represents a significant challenge due to competitive β-hydride elimination and associated selectivity issues. Herein, a Ni-catalyzed reductive 1,2-dialkylation of unactivated aliphatic alkenes has been developed using two different alkyl bromides. The reaction proceeds smoothly under mild conditions to install two Csp3–Csp3 bonds onto directed aliphatic alkenes, demonstrating
由于竞争性 β-氢化物消除和相关的选择性问题,未活化烯烃的交叉二烷基化是一项重大挑战。在此,已使用两种不同的烷基溴开发了未活化的脂肪族烯烃的镍催化还原 1,2-二烷基化。该反应在温和条件下顺利进行,将两个 C sp3 -C sp3键安装到定向脂肪族烯烃上,表现出优异的化学和区域选择性和良好的官能团耐受性。
Directed Nickel-Catalyzed Selective Arylhydroxylation of Unactivated Alkenes under Air
作者:Yihua Wang、Cong Lin、Zongxu Zhang、Liang Shen、Boya Zou
DOI:10.1021/acs.orglett.3c00085
日期:——
An expeditious and novel nickel-catalyzedselectivearylhydroxylation of unactivatedalkenes with arylboronic acids was developed. This protocol is compatible with β,γ- and γ,δ-alkene amides, including traditionally challenging internal alkenes, to provide important β-arylethylalcohol scaffolds. The free hydroxyl group in the final product could be smoothly further transformed into other functional