Chemoselectivity Control in the Reactions of 1,2-Cyclic Sulfamidates with Amines
作者:Lara Mata、Alberto Avenoza、Jesús H. Busto、Jesús M. Peregrina
DOI:10.1002/chem.201204392
日期:2013.5.17
Although 1,2‐cyclic sulfamidates derived from α‐methylisoserine undergo nucleophilicdisplacement at the quaternary center, to the best of our knowledge their behavior with amines as nucleophiles has never been explored. We have found that a broad range of amines can be used, demonstrating the scope of the reaction, and that excellent control of the chemoselectivity can be achieved. Application of
Highly chemoselective reactions on hindered sulfamidates with oxygenated nucleophiles
作者:Gonzalo Jiménez-Osés、Alberto Avenoza、Jesús H. Busto、Jesús M. Peregrina
DOI:10.1016/j.tetasy.2008.01.030
日期:2008.3
Although the chemoselectivity problems in substitution reactions, which arise from the use of oxygenated nucleophiles in a basic medium by generating anionic species are well-known, we report herein a highly chemoselective ring-opening reaction of hindered cyclic sulfamidates with O-nucleophiles. The reaction occurs with the inversion of configuration at the quaternary centre, allowing the stereoselective synthesis of an important class of beta(2,2)-amino acids, namely O-substituted alpha-methylisoserines. (C) 2008 Elsevier Ltd. All rights reserved.