Compounds of formula (I)
and pharmaceutically acceptable salts thereof are agonists at the beta-2 adrenoceptor. They are useful as feed additives for livestock animals.
式(I)的化合物及其药用可接受的盐是β-2肾上腺素受体的激动剂。它们可用作家畜动物的饲料添加剂。
Silica-Supported Sodium Sulfonate with Ionic Liquid: A Neutral Catalyst System for Michael Reactions of Indoles in Water
作者:Yanlong Gu、Chikako Ogawa、Shū Kobayashi
DOI:10.1021/ol062446b
日期:2007.1.1
A neutral catalytic system for Michael reactions of indoles has been developed by combining silica-supported benzenesulfonic acid sodium salt with hydrophobic ionicliquid in water. An efficient hydrophobic environment could be created on the surface of the silica-sodium material under the conditions. Various indole derivatives and alpha,beta-unsaturated carbonyl compounds including some acid-labile
Enantioselective synthesis of tetrahydrocyclopenta[b]indole bearing a chiral quaternary carbon center via Pd(<scp>ii</scp>)–SPRIX-catalyzed C–H activation
作者:Mohamed Ahmed Abozeid、Shiho Sairenji、Shinobu Takizawa、Makoto Fujita、Hiroaki Sasai
DOI:10.1039/c7cc03199h
日期:——
conjunction with the chiral spiro bis(isoxazoline) ligand (SPRIX). The presence of an N-allyl substituent on the substrate has a strong impact on both reactivity and selectivity, leading to tricyclic indole products (up to 96% ee) with a chiral quaternary carbon center.
Asymmetric Dearomatization of Indoles with Azodicarboxylates via Cascade Electrophilic Amination/Aza-Prins Cyclization/Phenonium-like Rearrangement
作者:Xian-Yun Huang、Pei-Pei Xie、Lei-Ming Zou、Chao Zheng、Shu-Li You
DOI:10.1021/jacs.3c02773
日期:2023.5.31
synthesis of enantioenriched aza-[3.3.1]-bicyclic enamines and ketones, a class of structural cores in many natural products, via asymmetric dearomatization of indoles with azodicarboxylates. The reaction is initiated by electrophilic amination and followed by aza-Prins cyclization/phenonium-like rearrangement. A newly developed fluorine-containing chiral phosphoric acid displays excellent activity in
Recyclable graphite oxide catalyzed Friedel–Crafts addition of indoles to α,β-unsaturated ketones
作者:A. Vijay Kumar、K. Rama Rao
DOI:10.1016/j.tetlet.2011.08.002
日期:2011.10
The Friedel-Crafts addition of indoles to alpha,beta-unsaturated ketones, and nitro styrenes was studied with graphite oxide as catalyst. Various indole derivatives were synthesized in good to excellent yields. The preparation of graphite oxide catalyst from simple and readily available starting materials makes this method more affordable. The heterogeneous graphite oxide can be easily recovered and recycled up to five cycles without loss of activity. (C) 2011 Elsevier Ltd. All rights reserved.