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
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
Synthesis of β-hydroxy esters using highly active manganese
作者:YoungSung Suh、Reuben D. Rieke
DOI:10.1016/j.tetlet.2003.11.045
日期:2004.2
A modified Reformatskyreaction is reported using highly reactive manganese (Mn*). The active manganese was found to readily react with α-haloester in the presence of aldehydes and ketones to yield the corresponding β-hydroxy esters. The reaction is carried out at roomtemperature in the absence of Lewis acid or trapping agents.
An efficient cobalt(I)-catalysed Reformatsky reaction using α-chloro esters has been developed. The catalyst is prepared by reducing the cobalt(II) chloride (5 %)/1,2-bis(diphenylphosphino)ethane (dppe)(5 %)/zinc iodide (10 %) system with zinc metal in acetonitrile in the presence of both the α-chloro ester and the carbonyl compound; good to excellent conversions to β-hydroxy esters are obtained at