N-Capping of Primary Amines with 2-Acyl-benzaldehydes To Give Isoindolinones
摘要:
A unique reactivity pattern, first observed in the conversion of the marine natural product pestalone into pestalachloride A, was investigated. It was shown that 2-formyl-arylketones smoothly react with ammonia and primary amines, respectively, under mild conditions to afford 3-substituted isoindolinones in high yield. The reaction represents a new option for the derivatization (N-capping) of primary amines. As the substrates are readily accessible the methodology opens a short and modular access to pharmaceutically relevant substituted isoindolinones.
Phthalides by Rhodium-Catalyzed Ketone Hydroacylation
作者:Diem H. T. Phan、Byoungmoo Kim、Vy M. Dong
DOI:10.1021/ja907711a
日期:2009.11.4
phthalides by using enantioselective ketone hydroacylation. In the presence of Rh[(Duanphos)]X (X = NO(3), OTf, OMs), various 2-ketobenzaldehydes undergo intramolecularhydroacylation to produce phthalide products in good yields and 92-98% ee's. Our study highlights the key role counterions play in controlling both reactivity and enantioselectivity. A concise asymmetric total synthesis of the celery extract
A facile and convenient synthesis of the chiral phthalide framework catalyzed by cationic iridium was developed. The method utilized cationic iridium/bisphosphine‐catalyzed asymmetric intramolecular carbonyl hydroacylation of 2‐keto benzaldehydes to furnish the corresponding optically active phthalide products in good to excellent enantioselectivities (up to 98% ee ). The mechanistic studies using
Novel 2[2-(1,3-diazacycloalk-2-enyl)]benzophenone compounds and novel 1,3-diazacycloalkenyl[2,1-a]isoindole compounds having useful analgesic and psychostimulant properties are prepared inter alia by condensation of o-benzoylbenzaldehydes with aliphatic diamines.
Lewis Acid-assisted Dirhodium(II)-catalyzed Ketone Hydroacylation
作者:Tomohiro Yasukawa、Shū Kobayashi
DOI:10.1246/cl.160862
日期:2017.1.5
Rh(II) salt and a Lewisacid, Sc(OTf)3, as a highly active and robust cooperative catalyst system for ketone hydroacylation was developed. The catalyst system showed highturnovernumbers (up to ca. 400) even under air, whereas the corresponding Rh(I)/Sc(OTf)3 system did not work well. The application of the Rh(II)/Sc system was also extended to hydroacylation of olefins and an enantioselective reaction
Process for the preparation of certain hydroperoxy derivatives
申请人:Hoffmann-La Roche Inc.
公开号:US04018765A1
公开(公告)日:1977-04-19
Novel 2[2-(1,3-diazacycloalk-2-enyl)]benzophenone compounds and novel 1,3-diazacycloalkenyl[2,1-a]isoindole compounds having useful analgesic and psychostimulant properties are prepared inter alia by condensation of o-benzoylbenzaldehydes with aliphatic diamines.