A Low Rhodium Content Smart Catalyst for Hydrogenation and Hydroformylation Reactions
作者:Stefano Paganelli、Riccardo Tassini、Vikas D. Rathod、Barbara Onida、Sonia Fiorilli、Oreste Piccolo
DOI:10.1007/s10562-020-03407-5
日期:2021.5
of activity in hydrogenation and hydroformylation reactions of an easily produced 0.18% Rh/Al2O3. Analytical studies on fresh and recycled samples shed light on the smart properties of such catalyst. Results showed high activity as well as fine/excellent chemoselectivity or regioselectivity, characteristics that may suggest a wide range of applicability. The low metal content catalyst 0.18% Rh/Al2O3
本文描述了一种易于生产的 0.18% Rh/Al2O3 在氢化和加氢甲酰化反应中的制备、广泛表征和活性研究。对新鲜和回收样品的分析研究揭示了这种催化剂的智能特性。结果显示出高活性以及优良/优异的化学选择性或区域选择性,这些特征可能暗示着广泛的适用性。低金属含量催化剂 0.18% Rh/Al2O3 在氢化和加氢甲酰化反应中都非常活跃,因此为有价值的 API 提供中间体,如萘丁美酮和依曲普坦,以及一种带有清新绿色花香的香味,让人想起百合花的香味谷。
NOVEL PROCESS FOR THE PREPARATION OF ELETRIPTAN
申请人:Pullagurla Manik Reddy
公开号:US20110207943A1
公开(公告)日:2011-08-25
The present invention relates to a novel process for the preparation of (R)-3-((1-methylpyrrolidin-2-yl)methyl)-5-(2-(phenylsulfonyl)ethyl)-1H-indole and its intermediates thereof.
A novel magnesium metal catalyzed synthesis of 5-ethyl-1H-indole from 5-[2-(phenyl sulfonyl)ethyl]-1H-indole by dephenylsulfonylation mechanism providing an alternative and attractive approach to 5-ethyl-1H-indole with high yields. This approach is for both the protected and unprotected indoles.
Process for producing [2-(arylsulfonyl) ethenyl] benzene derivatives
申请人:Sumitomo Chemical Company, Limited
公开号:US06201131B1
公开(公告)日:2001-03-13
The present invention provides a safer and more efficient process for producing [2-(arylsulfonyl)ethenyl]benzene derivatives of the formula (3):
wherein R1, R2, R3 and R4 are the same or different and each independently represent a hydrogen, fluorine, or chlorine atom, a lower alkyl group, or the like, and two adjacent R3 and R4 may bond each other at their terminals to form a ring, which the process is characterized in that a 2-(arylsulfonyl)ethanol of formula (1):
wherein R1 and R2 are as defined above, and an acid anhydride are reacted in the presence of a base, and the reaction liquid obtained is supplied to a reaction with an aromatic halide of formula (2):
wherein X represents a chlorine, bromine, or iodine atom, and R3 and R4 are the same as defined above, in the presence of a palladium catalyst and a base.