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Paper | Regular issue | Vol 38, No. 6, 1994, pp.1367-1374
Published online, 1st January, 1970
DOI: 10.3987/COM-94-6701
Selective Allylation and Propargylation of Azoles by Phase Transfer Catalysis in the Absence of Solvent

Enrique Díez-Barra,* Antonio de la Hoz, André Loupy, and Ana Sánchez-Migallón

*Facultad de Quimica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain


Phase transfer catalysis without solvent allows the selective preparation of N-allyl- and N-propargylazoles or N-(1-propenyl)- and N-(1,2-propadienyl) azoles by reaction of the parent azole with allyl or propargyl bromides. Small variations in the reaction conditions, base or temperature, afford the desired selectivity.