1-(Hetero)aryl-2,2,2-trichloroethanols are useful key intermediates for the synthesis of various bioactive compounds. Herein, we describe N-heterocyclic carbene (NHC)-coordinated cyclometallated palladium complex (CYP)-catalyzed (hetero)aryl addition of chloral hydrate using (hetero)arylboroxines, providing a new approach to 1-(hetero)aryl-2,2,2-trichloroethanols. Notably, PhS-IPent-CYP which coordinated
One-Pot Synthesis of Trichloromethyl Carbinols from Primary Alcohols
作者:Manoj K. Gupta、Zhexi Li、Timothy S. Snowden
DOI:10.1021/jo300725v
日期:2012.5.18
Versatile trichloromethyl carbinols can be prepared in one pot fromprimaryalcohols by treatment with Dess–Martin periodinane (DMP) in CHCl3 followed by introduction of commercially available 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). A modification of the method was used to convert chiral primaryalcohol (R)-(−)-2,2-dimethyl-1,3-dioxolane-4-methanol to the corresponding trichloromethyl carbinol with
Cyclopropane carboxylic acid esters and cyclopropane(thio)-carboxylic
申请人:Hoffmann-La Roche Inc.
公开号:US04276305A1
公开(公告)日:1981-06-30
Cyclopropane carboxylic acid esters and cyclopropane(thio)-carboxylic acid, esters, processes for their preparation, as well as pesticidal compositions containing these esters as the active ingredients and methods for the use of the pesticidal compositions are disclosed.
Reaction of chloral with naphthalene, and the synthesis of α-methoxynaphthylacetic acids from naphthyl(trichloromethyl)carbinols
作者:Wilkins Reeve、John C. Hoffsommer、Patrick F. Aluotto
DOI:10.1139/v68-363
日期:1968.7.1
Friedel–Crafts reaction of chloral and naphthalene, others have reported the isolation of only 2-naphthyl(trichloromethyl)carbinol. Our reexamination of this reaction has shown that a mixture of 1- and 2-naphthyl(trichloromethyl)carbinols is obtained and that 80 to 90% of the product consists of the 1-naphthyl(trichloromethyl)carbinol. The 1- and 2-naphthyl(trichloromethyl)carbinols, their acetates
Radical-Polar Crossover Catalysis with a d<sup>0</sup> Metal Enabled by a Redox-Active Ligand
作者:Joshua T. Gavin、Roman G. Belli、Courtney C. Roberts
DOI:10.1021/jacs.2c09114
日期:2022.11.30
Through use of a redox-active (tris)amido ligand we have accessed this mechanism for use with early transition metals. This mechanism is showcased through enabling product formation for a wide variety of elimination products from α-halo substituted benzylic bromides. The mechanism of this new type of reactivity with Sc is explored, and Hammett analysis reveals an anionic intermediate. The wide functional