A Method for Identifying and Developing Functional Group Tolerant Catalytic Reactions: Application to the Buchwald–Hartwig Amination
作者:Jeffery Richardson、J. Craig Ruble、Elizabeth A. Love、Simon Berritt
DOI:10.1021/acs.joc.7b00201
日期:2017.4.7
individual functional groups on the success of a transformation under various conditions and provides a simple framework for identifying new conditions that tolerate challenging functional groups. Application of this approach to profile the conditions for the Buchwald–Hartwig amination and rapidly identify bespoke conditions for challenging substrate classes is described.
[4 + 1] Annulation of in situ generated azoalkenes with amines: A powerful approach to access 1-substituted 1,2,3-triazoles
作者:Hongwei Wang、Yongquan Ning、Paramasivam Sivaguru、Giuseppe Zanoni、Xihe Bi
DOI:10.1016/j.cclet.2021.09.008
日期:2022.3
methods for their preparation mainly rely on thermal [3 + 2] cycloaddition of potentially dangerous acetylene and azides. Here we report a base-mediated [4 + 1] annulation of azoalkenes generated in situ from readily available difluoroacetaldehyde N-tosylhydrazones (DFHZ-Ts) with amines under relatively mild conditions. This azide- and acetylene-free strategy provides facile access to diverse 1-substituted