Copper-Catalyzed Enantiotopic-Group-Selective Allylation of <i>gem</i>-Diborylalkanes
作者:Minjae Kim、Bohyun Park、Minkyeong Shin、Suyeon Kim、Junghoon Kim、Mu-Hyun Baik、Seung Hwan Cho
DOI:10.1021/jacs.0c11750
日期:2021.1.20
We report a copper-catalyzed enatiotopic-group-selective allylation of gem-diborylalkanes with allyl bromides. The combination of copper(I) bromide and H8-BINOL derived phosphoramidite ligand proved to be the most effective catalytic system to provide various enantioenriched homoallylic boronate esters, containing a boron-substituted stereogenic center that is solely derived from gem-diborylalkanes
[EN] VINYLOGOUS PHENETHYLAMINES AS NEUROTRANSMITTER RELEASERS<br/>[FR] PHÉNÉTHYLAMINES VINYLOGUES À TITRE DE LIBÉRATEURS DE NEUROTRANSMETTEURS
申请人:RES TRIANGLE INST
公开号:WO2017197101A1
公开(公告)日:2017-11-16
The disclosure provides monoamine neurotransmitter releaser and/or monoamine uptake inhibitor compounds having biogenic amine transporter activity but lacking substantial activity at 5-HT2 receptor subtypes. The phenethylamine or vinylogous phenethylamine compounds of the disclosure are useful in treating diseases, conditions and/or disorders mediated by activity of one or more of the monoamine neurotransmitters.
Enantiomerically pure 5-monosubstituted 1,2 lambda(5)-oxaphospholanes were synthesized by the reaction of sodium hydride with enantiomerically pure 3-hydroxyalkyltriphenylphosphonium salts. The reaction of 1,2 lambda(5)-oxaphospholanes with aldehydes afforded Z-rich homoallylic alcohols in nearly quantitative yields. The E:Z ratio of the products was in the range of 11:89-34:66.
HAYASHI, TAMIO;KONISHI, MITSUO;KUMADA, MAKOTO, J. ORG. CHEM., 1983, 48, N 2, 281-282