Organocatalytic enantioselective formal synthesis of bromopyrrole alkaloids via aza-Michael addition
作者:Su-Jeong Lee、Seok-Ho Youn、Chang-Woo Cho
DOI:10.1039/c1ob06078c
日期:——
An unprecedented organocatalyticenantioselective formal synthesis of bromopyrrole alkaloid natural products is reported. An organocatalytic aza-Michael additionusing pyrroles as the N-centered nucleophile is utilized as the enantioselective step to construct the nitrogen-substituted stereogenic carbon center in bromopyrrole alkaloids in good yield and excellent enantioselectivity. The aza-Michael
Diverse Site-Selective Transformation of Benzylic and Allylic Silyl Ethers via Organocatalytic Oxidation
作者:Shohei Hamada、Kaori Sakamoto、Eri Miyazaki、Elghareeb E. Elboray、Yusuke Kobayashi、Takumi Furuta
DOI:10.1021/acscatal.3c01153
日期:2023.6.16
the electronic properties of silylethers, thus enabling selective oxidation of benzylic and allylic silylethers, despite steric factors. A subsequent one-pot reduction accomplishes the formal deprotection to the corresponding benzylic and allylic alcohols. This catalytic system allows the direct oxidative desymmetrization of bis-benzylic and bis-allylic silylethers to access synthetically useful
Cinchona-based primary amine-catalyzed enantioselective aza-Michael reactions of pyrroles with α,β-unsaturated aldehydes
作者:Su-Jeong Lee、Jun-Gi Ahn、Chang-Woo Cho
DOI:10.1016/j.tetasy.2014.09.002
日期:2014.10
The cinchona-based primary amine-catalyzed enantioselective aza-Michael reaction of alpha,beta-unsaturated aldehydes with 4,5-dihalo-1H-pyrrole-2-carbonitriles as the N-centered heteroaromatic nucleophile, followed by chemoselective reduction provided the corresponding chiral aza-Michael products in good yields and with excellent enantioselectivities (90-97% ee). (C) 2014 Elsevier Ltd. All rights reserved.
[EN] FUSED PYRROLE DERIVATES AS ESTROGEN RECEPTOR LIGANDS<br/>[FR] DÉRIVÉS PYRROLE CONDENSÉS SERVANT DE RÉCEPTEURS DES OESTROGÈNES
申请人:KAROBIO AB
公开号:WO2012136772A1
公开(公告)日:2012-10-11
The invention provides a compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein Z, A, B, D, E, G, M1, M2, M3, M4, M5, M6, p, q, r, R3, R4, R5 and R6 are as defined in the specification. The invention also provides the use of such compounds in the treatment or prophylaxis of a condition associated with a disease or disorder associated with estrogen receptor activity.
Phosphonium salt-catalysed synthesis of nitriles from in situ activated oximes
作者:Ross M. Denton、Jie An、Petra Lindovska、William Lewis
DOI:10.1016/j.tet.2012.01.067
日期:2012.4
A metal-free catalytic method for the conversion of aromatic and aliphatic aldoximes to nitriles at room temperature using oxalyl chloride (1.2 equiv) in combination with 5 mol % of triphenylphosphine oxide is reported. Of the many potential pathways leading from oxime to nitrile a manifold involving chlorophosphonium salt-catalysed decomposition of oxime chlorooxalates formed in situ is shown to be