A Four-Component Reaction for the Synthesis of Dioxadiazaborocines
作者:Thomas Flagstad、Mette T. Petersen、Thomas E. Nielsen
DOI:10.1002/anie.201502989
日期:2015.7.13
A four‐component reaction for the synthesis of heterocyclic boronates is reported. Readily available hydrazides, α‐hydroxy aldehydes, and two orthogonally reactive boronic acids are combined in a single step to give structurally distinct bicyclic boronates, termed dioxadiazaborocines (DODA borocines). In this remarkable process, one boronic acid reacts as a carbon nucleophile and the other as a boron
Petasis Three-Component Coupling Reactions of Hydrazides for the Synthesis of Oxadiazolones and Oxazolidinones
作者:Sebastian T. Le Quement、Thomas Flagstad、Remi J. T. Mikkelsen、Mette R. Hansen、Michael C. Givskov、Thomas E. Nielsen
DOI:10.1021/ol203280b
日期:2012.1.20
An application of readily available hydrazides in the Petasis 3-component coupling reaction is presented. An investigation of the substrate scope was performed to establish a general, synthetically useful protocol for the formation of hydrazido alcohols, which were selectively converted to oxazolidinone and oxadiazolone ring systems through triphosgene-mediated cyclization reactions.