An Oxidative [2,3]-Sigmatropic Rearrangement of Allylic Hydrazides
作者:Benjamin F. Strick、Devon A. Mundal、Regan J. Thomson
DOI:10.1021/ja2066219
日期:2011.9.14
The development of an efficient oxidative [2,3]-sigmatropicrearrangement of allylic hydrazides, via singlet N-nitrene intermediates, is reported. The requisite allylic hydrazide precursors are readily prepared and undergo smooth sigmatropic rearrangement upon exposure to iodosobenzene. The products of this novel transformation are shown to be useful precursors to a variety of compounds.
Photoredox Activation of SF<sub>6</sub>for Fluorination
作者:T. Andrew McTeague、Timothy F. Jamison
DOI:10.1002/anie.201608792
日期:2016.11.21
We report the first practical use of SF6 as a fluorinating reagent in organic synthesis. Photoredoxcatalysis enables the in situ conversion of SF6, an inert gas, into an active fluorinating species by using visiblelight. Under these conditions, deoxyfluorination of allylic alcohols is effected with high chemoselectivity and is tolerant of a wide range of functional groups. Application of the methodology
Highly diastereoselective generation of various 3,3-disubstituted allyl boronates for the stereospecific construction of quaternary centers
作者:Robyn Aryn Biggs、Maria Lambadaris、William W. Ogilvie
DOI:10.1016/j.tetlet.2014.09.038
日期:2014.10
Single isomer trisubstituted olefins were converted into allyl boron nucleophiles that were condensed with aldehydes to give products containing quaternary centers. The products were obtained in extremely high diastereomeric ratios, a reflection of the stereochemical integrity of the starting materials. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.