A copper(I)‐catalyzed addition of alkylborane reagents to α‐iminoacetates has been developed to assemble both acyclic and cyclic α‐branched α‐amino carboxylic acid derivatives in good yields. A wide variety of unactivated alkenes are well tolerated in this transformation.
One-Step Synthesis of Ethyl Quinaldates by Lewis Acid Catalyzed Three-Component Coupling Reaction of Aromatic Amines, Aliphatic Aldehydes and Ethyl Glyoxylate
作者:Isao Shimizu、Takashi Inada、Takayuki Nakajima
DOI:10.3987/com-05-s(k)48
日期:——
A convenient, efficient and simple one-pot method for the synthesis of quinaldates was developed by three-componentcouplingreaction of an arylamine (1), ethyl glyoxylate and an aliphatic aldehyde (2) in the presence of Lewisacid catalyst. The reaction proceeded most effectively using Yb(OTf) 3 as a catalyst.
Chiral Bifunctional Organocatalysts in Asymmetric Aza-Morita−Baylis−Hillman Reactions of Ethyl (Arylimino)acetates with Methyl Vinyl Ketone and Ethyl Vinyl Ketone
作者:Min Shi、Guang-Ning Ma、Jun Gao
DOI:10.1021/jo701764e
日期:2007.12.1
The bifunctionalchiral phosphine Lewis base (R)-2‘-diphenylphosphino-[1,1‘-binaphthalene]-2-ol is an effective organocatalyst in the asymmetric aza-MBH reaction of ethyl (arylimino)acetates 1 with MVK and EVK to give the corresponding adducts in moderate to good yields and good to high enantiomeric excesses under mild conditions.
Aza-Morita–Baylis–Hillman reaction of ethyl (arylimino)acetate with methyl vinyl ketone and ethyl vinyl ketone
作者:Jun Gao、Guang-Ning Ma、Qing-Jiang Li、Min Shi
DOI:10.1016/j.tetlet.2006.08.131
日期:2006.10
Aza-Morita–Baylis–Hillman (aza-MBH) reaction of ethyl (arylimino)acetate with methyl vinyl ketone and ethyl vinyl ketone has been investigated. We found that aza-MBH adducts 1 could be formed in the presence of DABCO (30 mol %) and the corresponding adducts 2 could be obtained in the presence of PPh3 (30 mol %) in moderate to good yields in acetonitrile under mild conditions, respectively.