The CF<sub>3</sub>-DAST-induced deacylative trifluoromethylthiolation of cyclic 1,3-diketones/lactams/lactones and its extension to deacylative pentafluorophenylthiolation
CF3-DAST-induced deacylative trifluoromethylthiolation of cyclic 1,3-diketones lactams, and lactones that provides cyclic trifluoromethylthioketones, lactams and lactones is reported.
A highly efficient and regioselective allylation reaction of amines and active methylene compounds directly using allylicalcohols under mild conditions catalyzed by the novel cubane-type sulfido [(Cp*Mo)3(μ3-S)4Pd(η3-allyl)][PF6]2 clusters has been developed. A variety of allylicalcohols and nucleophiles including amines and active methylene compounds are investigated, and in the case of allylic alcohols
Novel Tartrate-Based Guanidines for Enantioselective Fluorination of 1,3-Dicarbonyl and α-Cyano Carbonyl Compounds
作者:Liwei Zou、Xiaoze Bao、Huanrui Zhang、Yuming Song、Jingping Qu、Baomin Wang
DOI:10.1071/ch14179
日期:——
electronic properties. A guanidine molecule of this library with an incorporated 2,6-diisoaniline fragment was identified as a suitable promoter for the enantioselective fluorination of 1,3-dicarbonyl and α-cyano carbonyl compounds to furnish the fluorinated product with up to 84 % ee and 99 % yield using N-fluorobenzenesulfonimide (NFSI) as the fluorinating agent.
A novel library of chiral guanidines featuring a tartaric acid skeleton was developed from diethyl L-tartrate. These guanidines are easily accessed with tunable style and electronic properties. The utilities of the guanidines were highlighted by their ability to catalyze the alpha-hydroxylation of beta-ketoesters and beta-diketones with remarkable efficiency and excellent enantioselectivity.