Aldehydes vs Aldimines. Unprecedented Aldimine-Selective Nucleophilic Additions in the Coexistence of Aldehydes Using a Lanthanide Salt as a Lewis Acid Catalyst
作者:Shū Kobayashi、Satoshi Nagayama
DOI:10.1021/ja971153y
日期:1997.10.1
It is well-recognized that aldimines are less reactive than aldehydes toward nucleophilic additions. In this paper, an unprecedented change in the reactivity is described: preferential reactions of aldimines over aldehydes in nucleophilic additions using a lanthanide salt as a Lewis acidcatalyst. In the presence of a catalytic amount of ytterbium triflate (Yb(OTf)3), only aldimines reacted with silyl
Highly Efficient Synthesis of Homoallylamines from Aldimines with Allylstannane Promoted by MgI<sub>2</sub> Etherate
作者:Xingxian Zhang、Shenghui Hu、Junchen Shi
DOI:10.3184/030823410x12756737135354
日期:2010.6
We describe a mild and efficient procedure for the synthesis of homoallylamines by addition of allyltributylstannane to aldimines with promoted by MgI2 etherate (MgI2•(OEt2)n) in good to excellent yields.
A three-component reaction of aldehydes, amines and allyltributylstannane was efficiently carried out to afford the corresponding homoallylicamine derivatives in the presence of 20 mol% of MgI2 etherate [(MgI2*(OEt2) n ] under mild and neutral reaction conditions in good to excellent yields.
在温和和中性反应条件下,在 20 mol% MgI2 醚合物 [(MgI2*(OEt2) n ] 的存在下,醛、胺和烯丙基三丁基锡烷的三组分反应得到了相应的高烯丙基胺衍生物。优良的产量。
Group 4 Metal Triflates as Efficient Catalysts for Allylations of Imines with Allyltributylstannane and Mannich-Type Reactions of Imines with Silyl Enol Ethers
Catalytic allylation of imines with allyltributylstannane and catalytic Mannich-type reactions of imines with silyl enol ethers were successfully carried out in the presence of a group 4 metal triflate, such as Zr(OTf)4 or Hf(OTf)4, to afford the corresponding adducts in high yields.
Synthesis of homoallylic amines and acylhydrazides by tin powder-promoted multicomponent one-pot allylation reactions
作者:Junyan Ma、Danfeng Huang、Ke-Hu Wang、Yanli Xu、Siying Chong、Yingpeng Su、Ying Fu、Yulai Hu
DOI:10.1002/aoc.3472
日期:2016.7
efficient process for the synthesis of homoallylic amines and N′‐homoallylic hydrazides is developed from the one‐pot reaction of carbonyl compounds, amines or N‐acylhydrazines, allyllic bromide and tin powder using water as solvent. N‐Acylhydrazines are found to be more reactive than amines in these processes. They can react not only with aldehydes but also with ketones to give the corresponding N′‐homoallylic