Proline-Mediated Baylis–Hillman Reaction of Methyl Vinyl Ketone without a Co-catalyst under Solvent-Free Conditions
作者:Srinivasan Easwar、Heena Inani、Ajit Jha
DOI:10.1055/s-0036-1588320
日期:——
A proline-mediated Baylis–Hillmanreaction of methyl vinyl ketone with aromatic aldehydes has been carried out without using any co-catalyst, under solvent-free conditions. The reaction works efficiently at 60 °C in the presence of a small amount of water to afford the Baylis–Hillman adducts in reasonable to very good yields over 8–48 h. The absence of a co-catalyst suggests that proline plays a role
脯氨酸介导的甲基乙烯基酮与芳香醛的 Baylis-Hillman 反应已在无溶剂条件下进行,无需使用任何助催化剂。该反应在 60 °C 下在少量水存在下有效进行,以在 8-48 小时内以合理到非常好的产率提供 Baylis-Hillman 加合物。没有助催化剂表明脯氨酸除了参与亚胺离子形成和共轭加成外,还在反应机制的质子转移步骤中发挥作用。原则上,这意味着脯氨酸在反应中充当三功能催化剂,而对这方面更深入了解的机理研究应该会在未来提供进一步的见解。
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。
Synthesis of Unsaturated Seven-Membered Ring Lactams through Palladium-Catalyzed Amination and Intramolecular Cyclocarbonylation Reactions of Amines and Baylis−Hillman Acetates
作者:Hong Cao、Tiago O. Vieira、Howard Alper
DOI:10.1021/ol102699a
日期:2011.1.7
A versatile synthesis of unsaturated seven-membered ring lactams has been developed. The sequence involves hydroamination of Baylis−Hillman acetate with amines, followed by intramolecular cyclocarbonylation reactions of the resulting allylamines. This process can tolerate a wide array of functional groups, and affords lactams in excellent yields.
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.
Patil, Nitin R.; Kshirsagar, Siddheshwar W.; Samant, Shriniwas D., Journal of the Indian Chemical Society, 2013, vol. 90, # 10, p. 1703 - 1712
作者:Patil, Nitin R.、Kshirsagar, Siddheshwar W.、Samant, Shriniwas D.