Three-Component Ag-Catalyzed Enantioselective Vinylogous Mannich and Aza-Diels−Alder Reactions with Alkyl-Substituted Aldehydes
作者:Hiroki Mandai、Kyoko Mandai、Marc L. Snapper、Amir H. Hoveyda
DOI:10.1021/ja807243t
日期:2008.12.31
protocols for three-component catalytic enantioselectivevinylogousMannich (VM) reactions of alkyl-substituted aldimines (including those bearing heteroatom-containing substituents) and readily available siloxyfurans are presented. High efficiency and stereoselectivity is achieved through the use of o-thiomethyl-p-methoxyaniline-derived aldimines. Reactions, performed under an atmosphere of air and
Chiral VAPOL Imidodiphosphoric Acid-Catalyzed Asymmetric Vinylogous Mannich Reaction for the Synthesis of Butenolides
作者:Suoqin Zhang、Guangliang Zhang、Tianyun Zhou、Jigang Gao、Guofeng Liu、Xukai Guan、Dong An
DOI:10.1055/s-0037-1610232
日期:2018.9
Chiral butenolides were synthesized by the enantioselective vinylogousMannichreaction. Chiral (VAPOL)-type imidodiphosphoric acids are efficient catalysts for the asymmetricvinylogousMannich (AVM) reaction of aldimines and trimethylsiloxyfuran in toluene. Under the optimized conditions, a series of butenolides were obtained with high yields (up to 98%) and enantioselectivities (up to 97% ee) as
The application of chiral phosphine-Schiff base type ligands in silver(I)-catalyzed asymmetric vinylogous Mannich reaction of aldimines with trimethylsiloxyfuran
作者:Zhi-Liang Yuan、Jia-Jun Jiang、Min Shi
DOI:10.1016/j.tet.2009.05.080
日期:2009.8
Catalytic asymmetric vinylogous Mannich (AVM) reactions of readily available aldimines with trimethylsiloxyfuran in the presence of catalytic amount of AgOAc and chiralphosphine-Schiffbasetypeligands are described, affording the corresponding products in up to 91% yield, anti/syn >99:1 and 81% ee.
描述了在催化量的AgOAc和手性膦-席夫碱型配体存在下,易于获得的醛亚胺与三甲基甲硅烷氧基呋喃的催化不对称乙烯基乙烯基曼尼希(AVM)反应,可提供高达91%的收率的相应产品,抗/ syn > 99: 1和81%ee。
New silver(I)–monophosphine complex derived from chiral Ar-BINMOL: synthesis and catalytic activity in asymmetric vinylogous Mannich reaction
developed for silver-catalyzed asymmetric vinylogous Mannich reaction of (furan-2-yloxy)trimethylsilane with aromatic aldimines. It was found that the enantioselective vinylogous Mannich-type reactions of trimethylsiloxyfuran with aldimines are catalyzed efficiently by silver(I) complexes of the Ar-BINMOL-derived chiral monophosphine. This procedure displays wide aldimine versatility, excellent yields
C 2的新家族选自Ar-BINMOLs -axially手性单膦(AR-专业NNP)是为(呋喃-2-基氧基)与芳族醛亚胺三甲基硅烷的银催化的不对称插烯曼尼希反应的发展。据发现,trimethylsiloxyfuran与醛亚胺对映选择性插烯曼尼希型反应通过银有效地催化(I)上述Ar-BINMOL衍生的手性单膦的络合物。这个过程显示宽醛亚胺的通用性,优异的产率(高达99%的分离产率),中度至良好的对映选择性(高达78%ee)和非对映选择性出色的(> 99:1个,DR)在大多数情况下检查。重新-nucleophilic除了siloxyfuran到亚胺。
A Highly Efficient and Practical Method for Catalytic Asymmetric Vinylogous Mannich (AVM) Reactions
作者:Emma L. Carswell、Marc L. Snapper、Amir H. Hoveyda