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.
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
Chalcone and cinnamate synthesis via one-pot enol silane formation-Mukaiyama aldol reactions of ketones and acetate esters
作者:C. Wade Downey、Hadleigh M. Glist、Anna Takashima、Samuel R. Bottum、Grant J. Dixon
DOI:10.1016/j.tetlet.2018.06.066
日期:2018.8
Arylalkylketones, acetate esters, and acetamides undergo facile one-pot enol silane formation, Mukaiyama aldol addition, and dehydrosilyloxylation in the presence of an amine base and excess trimethylsilyl trifluoromethanesulfonate. The chalcone and cinnamate products are generally recovered in high yield. The relative stoichiometry of the trimethylsilyl trifluoromethanesulfonate and amine base reagents
作者:Qun Cao、Roderick T. Stark、Ian A. Fallis、Duncan L. Browne
DOI:10.1002/cssc.201900886
日期:2019.6.21
An operationally simple one‐jar one‐step mechanochemical Reformatsky reaction using in situ generated organozinc intermediates under neat grinding conditions has been developed. Notable features of this reaction protocol are that it requires no solvent, no inert gases, and no pre‐activation of the bulk zinc source. The developed process is demonstrated to have good substrate scope (39–82 % yield) and