Enantioselective Palladium(II)-Catalyzed Intramolecular Aminoarylation of Alkenes by Dual N−H and Aryl C−H Bond Cleavage
作者:Wen Zhang、Pinhong Chen、Guosheng Liu
DOI:10.1002/anie.201700889
日期:2017.5.2
An asymmetric palladium‐catalyzed intramolecular oxidative aminoarylation of alkenes has been developed with quinoline–oxazoline chiral ligands and Ag2CO3 as the oxidant. Various indolines containing a quaternary stereogenic center were synthesized in high yield with excellent enantioselectivity. Preliminary mechanistic studies suggest that the addition of a catalytic amount of phenylglyoxylic acid
用喹啉-恶唑啉手性配体和Ag 2 CO 3作为氧化剂,开发了不对称钯催化的烯烃分子内氧化氨基芳基化反应。含有四元立体异构中心的各种二氢吲哚以高产率合成,具有出色的对映选择性。初步的机理研究表明,加入催化量的苯乙醛酸可显着加快反应速度,并略微提高对映选择性。
Effect of ether versus ester tethering on Heck cyclizations
作者:Steven R. Woodcock、Bruce P. Branchaud
DOI:10.1016/j.tetlet.2005.08.072
日期:2005.10
Ether tethers allow Heck cyclizations to proceed in high yields. Ester tethers lead to low yields. Styrene trapping experiments indicate that ester reactions form viable organopalladium intermediates that cannot cyclize efficiently. (c) 2005 Elsevier Ltd. All rights reserved.
BEAUTEMENT, K.;CLOUGH, J. M., TETRAHEDRON LETT., 1984, 25, N 28, 3025-3028
作者:BEAUTEMENT, K.、CLOUGH, J. M.
DOI:——
日期:——
Oxazolinyl-Assisted Ru(II)-Catalyzed C–H Allylation with Allyl Alcohols and Synthesis of 4-Methyleneisochroman-1-ones
for C-H allylation of aryl oxazolines using allylic alcohols as the coupling partner. The present transformation unravels the unusual reactivity of allylic alcohols in the synthesis of 4-methyleneisochroman-1-ones and C-H-allylated products. A complete switch in the product selectivity was observed with substrate control and tuning the reaction conditions. The approach employs allylalcohols as an efficient
Reactions of 2-acylbenzoates with dimethyloxosulphonium methylide: A novel route to isocoumarins
作者:Kevin Beautement、John M. Clough
DOI:10.1016/s0040-4039(01)81355-1
日期:1984.1
Treatment of 2-benzoylbenzoates with dimethyloxosulphoniummethylide (1) gives 4-phenylisocoumarins (2); methyl 2-acetylbenzoate gives 4-methylene-3,4-dihydroisocoumarin (3) under the same conditions.