Hydroboration Catalyzed by 1,2,4,3-Triazaphospholenes
作者:Chieh-Hung Tien、Matt R. Adams、Michael J. Ferguson、Erin R. Johnson、Alexander W. H. Speed
DOI:10.1021/acs.orglett.7b02695
日期:2017.10.20
shown to catalyze the 1,2 hydroboration of 19 imines, and three α,β unsaturated aldehydes with pinacolborane, including examples that did not undergo hydroboration by previously reported diazaphospholene systems. DFT calculations support a mechanism where a triazaphospholene cation interacts with the substrate, a mechanism distinct from diazaphospholene catalyzed hydroborations.
Indium−Copper-Mediated Barbier−Grignard-Type Alkylation Reaction of Imines in Aqueous Media
作者:Zhi-Liang Shen、Teck-Peng Loh
DOI:10.1021/ol702263b
日期:2007.12.1
developed for Barbier-Grignard-typealkylationreactions of simple imines, using a one-pot condensation of various aldehydes, amines (including aliphatic and chiral version), and alkyl iodides in water or aqueousmedia. The reactions proceeded efficiently at room temperature to give the desired products in moderate to good yields. Good diastereoselectivities were obtained when using L-valine methyl
开发了一种有效的In / CuI / InCl3系统,用于在水或水性介质中一锅缩合各种醛,胺(包括脂肪族和手性版本)和烷基碘的简单亚胺的Barbier-Grignard型烷基化反应。反应在室温下有效地进行,以中等至良好的产率得到所需的产物。当使用L-缬氨酸甲酯作为底物时,获得了良好的非对映选择性。
Indium–Silver- and Zinc–Silver-Mediated Barbier–Grignard-Type Alkylation Reactions of Imines by Using Unactivated Alkyl Halides in Aqueous Media
作者:Zhi-Liang Shen、Hao-Lun Cheong、Teck-Peng Loh
DOI:10.1002/chem.200701468
日期:2008.2.18
efficient and practical method for the Barbier-Grignard-typealkylationreactions of simple imines by using a one-pot condensation of various aldehydes, amines (including the aliphatic and chiral version), and secondary alkyl iodides has been developed. The reaction proceeded more efficiently in water than in organic solvents. Without the use of CuI, it mainly gave the imine self-reductive coupling product
Electrochemical Allylation Reactions of Simple Imines in Aqueous Solution Mediated by Nanoscale Zinc Architectures
作者:Jing-Mei Huang、Xu-Xiao Wang、Yi Dong
DOI:10.1002/anie.201004852
日期:2011.1.24
I zinc we're alone now: The title reactions were achieved in an undivided cell fitted with a pair of zinc electrodes in aqueoussolution. A preliminary study on the relationship of reaction activity and surface morphology showed that the deposited zinc powders with nanoscale architectures had very high activity.
Reported herein is the first direct, metal‐catalyzed reductive functionalization of secondary amides to give functionalized amines and heterocycles. The method is shown to have exceptionally broad scope with respect to suitable nucleophiles, which cover both hard and soft C nucleophiles as well as a P nucleophile. The reaction exhibits good chemoselectivity and tolerates several sensitive functional