作者:Hyunah Choo、Youhoon Chong、Kwang-Su Park、Jinyoung Kim
DOI:10.1055/s-2007-968032
日期:2007.2
The Baylis-Hillman reaction was greatly accelerated by use of octanol as an additive. Under the octanol-accelerated Baylis-Hillman conditions, unactivated aldehydes such as aliphatic aldehydes and aromatic aldehydes with electron-withdrawing substituents were readily converted into the desired products in good to high yields.
Multifunctional chiral phosphines-catalyzed highly diastereoselective and enantioselective substitution of Morita–Baylis–Hillman adducts with oxazolones
作者:Yuan-Liang Yang、Cheng-Kui Pei、Min Shi
DOI:10.1039/c1ob00017a
日期:——
Multifunctional chiral phosphine (phosphine–thiourea type) L2-catalyzed allylicsubstitutions of MBH adducts 1 with oxazolones 2 produce the corresponding optically active adducts 3 in good to excellent yields and ee's as well as moderate to good de's under mild conditions. The synergistic interaction between hydrogen bond donor site and nucleophilic site has been discussed, indicating that finely
Amino acid ionic liquids as catalysts in a solvent-free Morita–Baylis–Hillman reaction
作者:Mathias Prado Pereira、Rafaela de Souza Martins、Marcone Augusto Leal de Oliveira、Fernanda Irene Bombonato
DOI:10.1039/c8ra02409j
日期:——
reaction between methyl vinyl ketone and aromatic aldehydes differently substituted in the absence of an additional co-catalyst under organic solvent-free conditions. The AAIL derivatives from L-valine, L-leucine, and L-tyrosine catalyzed the MBH reaction only in the presence of imidazole. The MBH adducts were obtained in moderate to good yields. Although the catalytic site in the ILs was in its enantiomerically
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
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。