Decomposition of Sodium Trichloroacetate in the Presence of Quaternary Ammonium under Microwave Irradiation: A Convenient One‐Pot Synthesis of α‐Hydroxy Acids in Water
Copper(I)-Promoted Synthesis of Chloromethyl Ketones from Trichloromethyl Carbinols
作者:Ram N. Ram、T. P. Manoj
DOI:10.1021/jo8007644
日期:2008.7.1
Reaction of several trichloromethyl carbinols with 2 equiv of CuCl/bpy in refluxing DCE for 3 h afforded chloromethyl ketones in excellent yield by 1,2-H shift in the copper-chlorocarbenoid intermediate.
Lewis acid catalysis of the ene addition of chloral and bromal to olefins; product studies
作者:Jill P. Benner、G. Bryon Gill、Stephen J. Parrott、Brian Wallace
DOI:10.1039/p19840000291
日期:——
The addition of chloral and bromal to a variety of alkyl-substituted alkenes has been investigated. The effect on the reaction of varying the Lewisacid catalyst and the structure of the substrate have been studied. Anhydrous AlCl3 was found to be the most effective catalyst, and ene-type adducts were the major products in most cases. Side reactions were observed with the less reactive systems leading
β-(Carbonatoxy)alkyl radicals: a new subset of β-(ester)alkyl radical fragmentation during copper(I)-mediated synthesis of 1,1-dichloro-1-alkenes
作者:Ram N. Ram、Ram K. Tittal
DOI:10.1016/j.tetlet.2014.05.097
日期:2014.7
A new subset of β-(ester)alkyl radicals is presented. It is the first study on the chemistry of β-(alkoxycarbonyloxy)alkyl radicals that fill the gap in the spectrum of the migrating groups in β-(ester)alkyl radical reactions. The change from less nucleofugal (acetate) group to the more nucleofugal (carbonate) group in the spectrum of the migrating group changed the reaction path from rearrangement
When the reaction of aldehydes with alkali metal trihaloacetates is carried out in the presence of a highly polar aprotic solvent (DMF, DMSO), novel organic alkali metal carbonates, which are precursors of pyrethroid insecticides, are formed in high yields and at a high rate. Novel sulfonates and dihalophosphites, derived from these carbonates have also been claimed.
[EN] PHOSPHONIC ACID DERIVATIVES CONTAINING A TRIAZOLE RING AS HERBICIDES
申请人:ZENECA LIMITED
公开号:WO1993015610A1
公开(公告)日:1993-08-19
(EN) A herbicidal compound of formula (I) or a salt, tautomer or cyclic derivative thereof; where R1 and R2 are hydrogen and A is an optionally substituted saturated or unsaturated chain or ring of three carbon atoms. Methods for preparing these compounds, intermediates used in the preparation and herbicidal compositions containing them are also described and claimed.(FR) On décrit un composé herbicide de la formule (I) ou un sel, un dérivé tautomère ou cyclique de celui-ci, où R1 et R2 représentent hydrogène et A représente un noyau ou chaîne de trois atomes de carbone, saturé ou insaturé éventuellement substitué. On décrit et on revendique également des procédés de préparation de ces composés, des intermédiaires utilisés dans la préparation et des compositions herbicides les contenant.