Catalytic Staudinger/Aza-Wittig Sequence by in situ Phosphane Oxide Reduction
作者:Henri A. van Kalkeren、Colet te Grotenhuis、Frank S. Haasjes、C. Rianne A. Hommersom、Floris P. J. T. Rutjes、Floris L. van Delft
DOI:10.1002/ejoc.201300585
日期:2013.11
A Staudinger/aza-Wittig reaction sequence is described that is catalytic in phosphorus. Towards this end, the phosphaneoxide is reduced in situ by diphenylsilane, which allows for substoichiometric amounts of the catalyst 5-phenyldibenzophosphole to be used. The substrate scope is investigated and benzoxazoles, benzodiazepine imidates and a 2-methoxypyrrole were successfully synthesized. These investigations