Preparation of 2,2-Dihalocarboxylic Acid Methyl Esters by Oxidation–Chlorination of 2-(1-Haloalkyl)-4-methyl-1,3-dioxolanes with Trichloroisocyanuric Acid
Halogen atom transfer radical addition of α-polychloroesters to olefins promoted by Fe0 filings
作者:Luca Forti、Franco Ghelfi、Emanuela Libertini、Ugo M. Pagnoni、Ercole Soragni
DOI:10.1016/s0040-4020(97)10241-1
日期:1997.12
The Kharasch addition of methyl 2,2-dichlorocarboxylates or trichloro acetic acid derivatives to alkenes, affording the corresponding 1:1 adducts, is promoted by the iron filings/N,N-dimethylformamide system.
Trichloroisocyanuric Acid Oxidation of 2-Chloro Aldehyde Acetals to 2-Chloro Acid Esters
作者:Monica Boni、Franco Ghelfi、Ugo Maria Pagnoni、Adriano Pinetti
DOI:10.1246/bcsj.67.156
日期:1994.1
2-Chloro acid methyl esters were prepared in good yields treating 2-chloro aldehyde dimethyl acetals with trichloroisocyanuric acid in DMF. Aldehyde dimethyl acetals with the 2-halogen on a tertiary carbon atom were poorly reactive and could be oxidized effeciently only after their transformation into 1,3-dioxolanes.
Methyl α,α-dichloro-esters by oxidation-chlorination of cyclic acetals with trichloroisocyanuric acid
作者:Franco Bellesia、Monica Boni、Franco Ghelfi、Ugo M. Pagnoni
DOI:10.1016/s0040-4039(00)76672-x
日期:1994.5
Methyl α-chloro- or α,α-dichloro-esters are obtained in excellent yields by oxidation chlorination of 2-alkyl-4,5-dimethyl-1,3-dioxolanes with trichloroisocyanuric acid.
Zinc Promoted Addition of Methyl 2,2-Dihalocarboxylates to Carbonyl Compounds
作者:Marta Benincasa、Luca Forti、Franco Ghelfi、Emanuela Libertini、Ugo M. Pagnoni
DOI:10.1080/00397919608004648
日期:1996.11
Abstract Methyl2,2-dihalocarboxylates add easily to carbonyl compounds in fair to good yields through the intermediate formation of 2-haloester enolates; the reaction is promoted by zinc, following a “Barbier” type procedure.