Palladium(0)-Catalyzed Cross-Coupling of 1,1-Diboronates with Vinyl Bromides and 1,1-Dibromoalkenes
作者:Huan Li、Zhikun Zhang、Xianghang Shangguan、Shan Huang、Jun Chen、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201407000
日期:2014.10.27
Palladium‐catalyzed cross‐coupling reactions of 1,1‐diboronates with vinylbromides and dibromoalkenes were found to afford 1,4‐dienes and allenes, respectively. These reactions utilize the high reactivities of both 1,1‐diboronates and allylboron intermediates generated in the initial coupling.
Cs<sub>2</sub>CO<sub>3</sub>-Promoted One-Pot Synthesis of Alkynylphosphonates, -phosphinates, and -phosphine Oxides
作者:Yulei Wang、Jiepeng Gan、Liu Leo Liu、Hang Yuan、Yuxing Gao、Yan Liu、Yufen Zhao
DOI:10.1021/jo500312n
日期:2014.4.18
trialkyl phosphites, ethyl diphenylphosphinite, or diethyl phenylphosphonite has been developed under metal-free conditions, providing a practical and powerful tool for one-pot synthesis of valuable alkynylphosphonates, -phosphinates, and -phosphine oxides in good to excellent yields.
在无金属条件下开发了一种新颖且有效的Cs 2 CO 3促进的各种1,1,1-二溴-1-烯烃与容易获得的亚磷酸三烷基酯,乙基二苯基亚膦酸酯或二乙基苯基亚膦酸酯的磷酸化或亚膦酰基化,提供了实用而有效的方法一锅合成有价值的炔基膦酸酯,-次膦酸酯和-膦氧化物的工具,产率很高。
A Tandem Oxidation Procedure for the Conversion of Alcohols into 1,1-Dibromoalkenes
作者:Richard J. Taylor、Steven A. Raw、Mark Reid、Estelle Roman
DOI:10.1055/s-2004-820027
日期:——
A practical and concise route to dibromoalkenes directly from activated alcohols in good to excellent yields using a new Tandem OxidationProcedure (TOP) is reported. We also describe the use of these dibromoalkenes as intermediates in a one-pot route to 4,5-dihydro-1H-imidazoles and in the synthesis of bromoalkynes through MTBD-induced elimination.
One-pot conversion of activated alcohols into 1,1-dibromoalkenes and terminal alkynes using tandem oxidation processes with manganese dioxide
作者:Ernesto Quesada、Steven A. Raw、Mark Reid、Estelle Roman、Richard J.K. Taylor
DOI:10.1016/j.tet.2005.12.077
日期:2006.7
Approaches to the preparation of C1-homologated dibromoalkenes and terminal alkynes from activated alcohols using one-pot tandem oxidation processes (TOPs) with manganesedioxide are outlined. The conversion of alcohols into dibromoalkenes is described using dibromomethyltriphenylphosphonium bromide and the formation of terminal alkynes was achieved via a sequential one-pot, two-step process utilising
Synthesis of dibromoolefins via a tandem ozonolysis–dibromoolefination reaction
作者:Brenna Arlyce Brown、Jonathan G.C. Veinot
DOI:10.1016/j.tetlet.2012.11.121
日期:2013.2
In this Letter we outline the synthesis of a variety of dibromoolefins (DBOs) from a series of alkenes by coupling an oxidative cleavage and a reaction with a phosphorous ylide. This approach strategically avoids isolation of reactive aldehyde intermediates and presents one of the few examples coupling carbon–carbon bond formation with ozonolysis.