Chemodivergent, Regio‐ and Enantioselective Cycloaddition Reactions between 1,3‐Dienes and Alkynes
作者:Dipshi Singh、T. V. RajanBabu
DOI:10.1002/anie.202216000
日期:2023.2.13
Reported herein are ligand controlled, chemodivergent [4+2] or [2+2] cycloaddition reactions between readily available 1,3-dienes and alkynes. These reactions, catalyzed by cationic CoI proceed with high regio- and enantioselectivies to give nearly enantiopure functionalized 1,4- cyclohexadienes or cyclobutenes from the same starting materials.
本文报道的是容易获得的 1,3-二烯和炔烃之间配体控制的化学发散 [4+2] 或 [2+2] 环加成反应。这些由阳离子 Co I催化的反应以高区域选择性和对映选择性进行,从相同的原料中得到几乎对映纯的官能化 1,4-环己二烯或环丁烯。
Ambiphilic allenyl enolates
作者:Mark A. Fredrick、Martin Hulce
DOI:10.1016/s0040-4020(97)00389-x
日期:1997.7
Internal redox catalyzed by triphenylphosphine
作者:Barry M. Trost、Uli Kazmaier
DOI:10.1021/ja00046a062
日期:1992.9
Palladium-Catalyzed Elimination/Isomerization of Enol Triflates into 1,3-Dienes
作者:Ian T. Crouch、Timothy Dreier、Doug E. Frantz
DOI:10.1002/anie.201101820
日期:2011.6.27
were synthesized by the title reaction (see scheme; Tf=trifluoromethanesulfonyl). Preliminary studies support a mechanistically distinct pathway that involves an initial β‐hydride elimination from a cationic vinyl palladium(II) intermediate, a subsequent regiospecific hydropalladation of the corresponding allene intermediate, and a final β‐hydride elimination.