A One-Pot Reaction toward the Diastereoselective Synthesis of Substituted Morpholines
作者:Thomas Aubineau、Janine Cossy
DOI:10.1021/acs.orglett.8b03141
日期:2018.12.7
The diastereoselectivesynthesis of various substituted morpholines has been achieved from vinyloxiranes and amino-alcohols under sequential Pd(0)-catalyzed Tsuji–Trost/Fe(III)-catalyzed heterocyclization. Using the same strategy, 2,6-, 2,5-, and 2,3-disubstituted as well as 2,5,6- and 2,3,5-trisubstituted morpholines were obtained in good to excellent yields and diastereoselectivities.
Abstract TMEDADC obtained from Chromiumtrioxide and TMEDA has been conveniently utilized for the selective oxidation of benzylic and allylic alcohols in excellent yield for the first time.
SYNTHESIS OF α,β-UNSATURATED CARBONYLS FROM ALKENES VIA SULFONIUM INTERMEDIATES AND THEIR APPLICATION IN THE SYNTHESIS OF CONJUGATED DIENE PHEROMONES, KAIROMONES, AND RELATED COMPOUNDS
申请人:[en]TERMÉSZETTUDOMÁNYI KUTATÓKÖZPONT
公开号:WO2024105421A1
公开(公告)日:2024-05-23
α,β-Unsaturated aldehydes are useful products as such in agrochemistry, but also potential intermediates for the preparation of important insect pheromones and kairomones. Until now, primarily the thermodynamically more stable (E)-α,β-unsaturated aldehydes have been identified as useful intermediates in the production of conjugated diene pheromone compounds, however, their practical and cost-effective synthesis on an industrial scale remains challenging. The problem to be solved by the present invention is to provide a method for selective oxidation of alkenes to α,β-unsaturated carbonyls which can be further transformed into pheromones and kairomones preferably without isolation and significant loss of the existing stereochemical purity.