Mild Darzens Annulations for the Assembly of Trifluoromethylthiolated (SCF<sub>3</sub>) Aziridine and Cyclopropane Structures
作者:Michael D. Delost、Jon T. Njardarson
DOI:10.1021/acs.orglett.1c02204
日期:2021.8.6
We report mild new annulation approaches to trisubstituted trifluoromethylthiolated (SCF3) aziridines and cyclopropanes via Darzens inspired protocols. The products of these anionic annulations, rarely studied previously, possess attractive features rendering them valuable building blocks for synthesis platforms. In this study, trisubstituted acetophenone nucleophiles bearing SCF3 and bromine substituents
Copper Catalyzed C−H Functionalization for Direct Mannich Reactions
作者:Magnus Rueping、Nikita Tolstoluzhsky
DOI:10.1021/ol103150g
日期:2011.3.4
A protocol for a practical and direct addition of alpha- and gamma-alkyl azaarenes to N-sulfonyl aldimines has been developed. Copper salts act as efficient Lewis acid catalysts for direct Mannich-type reactions providing a mild and fast access to various functionalized heterocycles.
Enantioselective Aza-Reformatsky Reaction with Ketimines
作者:Aitor Maestro、Edorta Martinez de Marigorta、Francisco Palacios、Javier Vicario
DOI:10.1021/acs.orglett.9b03669
日期:2019.12.6
and a simple BINOL-derived ligand, phosphorated analogues of aspartic acid holding chiral tetrasubstituted carbons are efficiently obtained with excellent enantioselectivity through an asymmetric organocatalytic Reformatsky-type reaction. The phosphorated analogues of aspartic acid have been used for the synthesis of phosphorus-containing enantiopure tetrasubstituted β-lactams.
A new reagent for the synthesis of [26]hexaphyrin: N-sulfonyl aldimine
作者:Seda Cinar、Baris Temelli、Canan Unaleroglu
DOI:10.1016/j.tetlet.2013.11.101
日期:2014.1
The selectivesynthesis of [26]hexaphyrin(1.1.1.1.1.1) has been achieved by the reaction of meso-substituted tripyrrane and N-sulfonyl aldimine. The protocol is simple and requires only a catalytic amount of copper(II) triflate under mild reaction conditions.