New Regio- and Stereoselective Cascades via Unstabilized Azomethine Ylide Cycloadditions for the Synthesis of Highly Substituted Tropane and Indolizidine Frameworks
作者:Shuming Chen、Vlad Bacauanu、Tobias Knecht、Brandon Q. Mercado、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/jacs.6b08355
日期:2016.9.28
Multisubstituted tropanes and indolizidines have been prepared with high regio- and stereoselectivity by the [3+2] cycloaddition of unstabilized azomethineylides generated from readily prepared trimethylsilyl-substituted 1,2-dihydropyridines via protonation or alkylation followed by desilylation. Starting from 1,2-dihydropyridines bearing a ring trimethylsilyl substituent at the 6-position, an intermolecular
Primary allylic amines with enantiomeric excesses from 97 to >99% were prepared by asymmetric transfer hydrogenation of α,β-unsaturated N-(tert-butylsulfinyl)ketimines followed by removal of the sulfinyl group. The effect caused by different substituents at the C═C bond and at the iminic carbon atom on the chemoselectivity of the reduction was studied. The desired enantiomer of the final allylic amine
[EN] CARBONYL CONTAINING COMPOUNDS FOR CONTROLLING AND REPELLING CIMICIDAE POPULATIONS<br/>[FR] COMPOSÉS CONTENANT UN CARBONYLE POUR MAÎTRISER ET REPOUSSER DES POPULATIONS DE CIMICIDAE
申请人:SEMIOSBIO TECHNOLOGIES INC
公开号:WO2012129702A1
公开(公告)日:2012-10-04
Compositions and methods for controlling and/or repelling bedbugs are provided. The compositions comprise one or more compounds having bedbug repellant activity. Such compounds may be, for example, naturally occurring semiochemicals or structural or functional analogs of naturally occurring semiochemicals. Exemplary compounds are compounds of general formula (I).
Mechanistic aspects of a novel, 1,2-3,4 reductive-fragmentation that establishes four stereocenters in a single step
作者:Ronald B. Gammill、Larry T. Bell、Stephen A. Mizsak
DOI:10.1016/s0040-4039(00)98055-9
日期:1990.1
Reduction of a β-furanyl unsaturated ketone with LiAlH4, LiAlD4 or sodium bis(methoxyethoxy)aluminum hydride (SMEAH) results in a novel reductive-fragmentation in which four elements of stereochemistry are established in a single step.
Carbonyl containing compounds for controlling and repelling Cimicidae populations
申请人:Gilbert Michael
公开号:US11116212B2
公开(公告)日:2021-09-14
Compositions and methods for controlling and/or repelling bedbugs are provided. The compositions comprise one or more compounds having bedbug repellant activity. Such compounds may be, for example, naturally occurring semiochemicals or structural or functional analogs of naturally occurring semiochemicals. Exemplary compounds are compounds of general formula (I).