An efficient, economical, and practical Reformatsky reaction of α-halo carbonylcompounds with aldehydes/ketones by using cheap and commercial iron(0) powder as reaction mediator is developed. The reactions proceeded effectively in the presence of a catalytic amount of iodine (20 mol %) to afford the synthetically useful β-hydroxyl carbonylcompounds in moderate to good yields.
Access to β-Hydroxyl Esters via Copper-Catalyzed Reformatsky Reaction of Ketones and Aldehydes
作者:Ren Shi Luo、Lu Ouyang、Jian Hua Liao、Yan Ping Xia
DOI:10.1055/s-0040-1707110
日期:2020.9
An efficient and simple Cu-catalyzed Reformatsky reaction of ketones and aldehydes has been accomplished with ethyl iodoacetate. Excellent yields of β-hydroxyl esters were achieved with a range of ketones and aldehydes, which varied from aromatic to aliphatic, unsaturated to saturated ketones and aldehydes. This practical and convenient transformation was conducted with inexpensive, readily available
Dimethylzinc-Mediated, Oxidatively Promoted Reformatsky Reaction of Ethyl Iodoacetate with Aldehydes and Ketones
作者:Pier Giorgio Cozzi、Alessandro Mignogna、Paola Vicennati
DOI:10.1002/adsc.200700572
日期:2008.5.5
A practical and general Reformatskyreaction, promoted by oxidants and mediated by dimethylzinc, is described. The reaction is fast and runs at 0 °C with aldehydes and ketones, under mild reaction conditions. Preliminary results obtained for the enantioselective version show that inexpensive chiral amino alcohols could be used in the challenging formation of enantioenriched quaternary stereogenic centers
N-Heterocyclic carbene mediated Reformatsky reaction of aldehydes with α-trimethylsilylcarbonyl compounds
作者:Xiao-Lei Zou、Guang-Fen Du、Wan-Fu Sun、Lin He、Xiao-Wei Ma、Cheng-Zhi Gu、Bin Dai
DOI:10.1016/j.tet.2012.11.015
日期:2013.1
N-Heterocycliccarbenes have been employed as highly efficient organocatalysts to mediate silyl-Reformatsky type reaction. In the presence of only 0.5 mol % nucleophiliccarbene 1, various aldehydes coupled with α-trimethylsilylethylacetate very smoothly in DMF at room temperature to provide the corresponding β-hydroxyesters in moderate to high yields. α-Trimethylsilylketone and α-trimethylsilylamide
P(<i>i</i>-PrNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: Efficient Catalyst for Synthesizing β-Hydroxyesters and α,β-Unsaturated Esters using α-Trimethylsilylethylacetate (TMSEA)
作者:Kuldeep Wadhwa、John G. Verkade
DOI:10.1021/jo900477q
日期:2009.6.5
We present an efficient synthesis of β-hydroxyesters and α,β-unsaturatedesters via activation of the silicon−carbon bond of α-trimethylsilylethylacetate using catalytic amounts of the commercially available P(i-PrNCH2CH2)3N 1a. Selectivity for either of these two products can be achieved simply by altering the catalyst loading and reaction temperature to afford addition or stereoselective condensation
我们提出了通过使用催化量的市售P(i- PrNCH 2 CH 2)3 N 1a活化α-三甲基甲硅烷基乙酸乙酯的硅碳键来有效合成β-羟基酯和α,β-不饱和酯的方法。通过改变催化剂的加入量和反应温度以提供加成或立体选择性缩合,可以简单地实现对这两种产物中任一种的选择性。这种方法比较温和,可以耐受各种各样的官能团。