Brucine N-oxide-catalyzed Morita–Baylis–Hillman reaction of vinyl ketones: a mechanistic implication of dual catalyst system with proline
作者:Kyungsoo Oh、Jian-Yuan Li、Jinhyang Ryu
DOI:10.1039/c003667f
日期:——
The brucine N-oxide promoted Morita–Baylis–Hillman (MBH) reaction of vinyl ketones with aldehydes has been achieved. The corresponding asymmetric version of MBH reaction was also investigated, and the electron-deficient aryl aldehydes have emerged as suitable reaction partners for vinyl ketones; where proline was employed as a co-catalyst. In this dual catalyst system, proline is believed to form iminium
An insoluble Merrifield type resin having 4-aminopyridine units is a suitable and reusable heterogeneous catalyst for the BaylisâHillman coupling of aromatic aldehydes and α,β-unsaturated ketones.
1-Methylimidazole 3-N-oxide as a new promoter for the Morita–Baylis–Hillman reaction
作者:Yu-Sheng Lin、Chih-Wei Liu、Thomas Y.R. Tsai
DOI:10.1016/j.tetlet.2005.01.099
日期:2005.3
The Morita-Baylis-Hillman reaction of aldehydes with alpha,beta-unsaturated ketones can be affected by the Lewis bases. We have found that 1-methylimidazole 3-N-oxide promoted the Morita-Baylis-Hiliman reaction of various activated aldehyde compounds in non-solvent system. This is a mild reaction condition and requires no special equipment to give the Morita-BaylisHillman adducts. (C) 2005 Elsevier Ltd. All rights reserved.
First Evidence of Proline Acting as a Bifunctional Catalyst in the Baylis–Hillman Reaction Between Alkyl Vinyl Ketones and Aryl Aldehydes
作者:Michelangelo Gruttadauria、Francesco Giacalone、Paolo Lo Meo、Adriana Mossuto Marculescu、Serena Riela、Renato Noto
DOI:10.1002/ejoc.200701112
日期:2008.3
Proline in the presence of sodium hydrogen carbonate has been found to be an effective catalyst for the Baylis–Hillman reaction between methyl or ethylvinyl ketone and aryl aldehydes. Screening of several amine catalysts showed that an ionizable carboxylic function directly linked to the secondary amine catalyst plays an important role in the synthesis of the desired product in good yield. The data
Synthesis of Pyrazolo[4,3-<i>c</i>]quinolines from Morita-Baylis-Hillman Adducts of 2-Bromobenzaldehydes
作者:Jin Yu、Hye Ran Moon、Jin Woo Lim、Jae Nyoung Kim
DOI:10.1002/bkcs.10050
日期:2015.1
The synthesis of pyrazolo[4,3‐c]quinolines has been carried out from the Morita–Baylis–Hillman bromides of 2‐bromobenzaldehydes and methyl vinyl ketone. The synthesis involved a novel one‐pot preparation of functionalized pyrazoles from α,β‐enones, a one‐pot Cu‐mediated intramolecular N‐arylation, and the elimination of p‐toluenesulfinic acid.
吡唑并[4,3– c ]喹啉的合成是从森田—贝利斯—希尔曼的2-溴苯甲醛和甲基乙烯基酮的溴化物中进行的。该合成涉及从α,β-烯酮一锅法制备官能化吡唑的新方法,一锅Cu介导的分子内N-芳基化作用以及对甲苯磺酸的消除。