Treatment of terminal acetylenes (R1CCH) with secondary or tertiary alkyl iodides (R2I) in the presence of triethylborane provides the corresponding alkenyl iodides (R1C(I)CHR2) in good yields.
Iodine atom transfer addition reactions with alkynes. Part 1: Alkyl iodides
作者:Dennis P. Curran、Dooseop Kim
DOI:10.1016/s0040-4020(01)86550-9
日期:1991.8
Simple 2° - and 3° -alkyl iodides add smoothly to electron deficient alkynes under standard atom transfer conditions 10% Bu3SnSnBu3, sunlamp photolysis. Mechanistic experiments help to interpret stereochemical and yield trends, and a new model for atom abstraction reactions of rapidly inverting a-vinyl radicals is proposed.