A copper‐mediated one‐pot sequential reaction of terminal alkynes, azides, and propargylic carbonates is reported. The three component reaction occurs readily at room temperature to afford a 5‐allenyl‐1,2,3‐triazoles in high yields, providing a straightforward approach to 1,3,5‐trisubstituted triazoles using easily available Cu(I) reagent.
Ti(OiPr)4-Mediated nucleophilic substitution of propargylic esters
作者:R Mahrwald、S Quint、S Scholtis
DOI:10.1016/s0040-4020(02)01286-3
日期:2002.12
The direct and catalytic displacement reactions of propargylic esters are reported. The reaction is based on the Ti(OR)(4)/alpha-hydroxy acid mediated ligand exchange. This methodology enables the inclusion of a broad range of acetylenes and aldehydes into this substitution reaction. (C) 2002 Elsevier Science Ltd. All rights reserved.