Peter Vinczer

Chemistry of the wittig reaction, IV Simple conversion of aldehydes to 1,1-dichloroalkane and 1,1-dichloro-1-alkene derivatives, useful intermediates for the synthesis of acetylenic compounds

Abstract The formation of 1,1-dichloroalkanes and 1,1-dichloro-l-alkenes from aldehyde is described using triphenylphosphine - carbon tetrachloride reagent system. Different products can be formed by changing the reaction conditions.

A novel stereocontrolled synthesis of (z,z)-3,13-octadecadien-1-yl acetate, the sex pheromone of synanthedon species

Abstract Starting from 10-undecenoic acid, a stereocontrolled synthesis of (Z,Z)-3,13-octadecadien-1-yl acetate with high stereochemical purity was achieved by the use of Wittig-olefinations for the introductions of (Z)-double bonds.

Simple and Stereocontrolled Synthesis of an Optimal Isomeric Mixture of 3,13-Octadecadien-1-YL Acetates

Abstract A simple route has been developed for the preparation of the optimal isomeric mixture of 3,13-octadecadien-1-yl acetates /ODDA/ which is the active sex pheromone of many Synanthedon species. The stereocontrolled formation of double bonds have been achieved via Wittig reaction and subsequent reduction of C-C triple bond.

An Improved Esterification of Carboxylic Acids Using Phase Transfer Conditions Without Solvents

Abstract Esterification of sodium salt of carboxilic acids were performed with alkyl bromide in phase-transfer conditions without solvent.

Synthesis of alkenoic acid derivatives containing cyclopropane ring, new juvenile hormone analogs

Abstract A synthetic method is described for the preparation of new type juvenoids [ 2 ].

A Mild Method for the Formation of Tosylhydrazone Derivatives from Keto Esters

Abstract An improved preparation of tosylhydrazones of α- and β-keto esters, by means of active aluminium oxide as catalyst, are described.

One-step conversion of carboxylic esters to the acetates of the corresponding alcohols Applying on the synthesis of lepidopteran pheromones

Abstract Esters R-COOCH3 are transformed to acetates R-CH2OAc in one step without isomerisation of the C=C bonds.