A series of 15 benzene-fused hexahydropyrrolo[1,2-b]isoquinolonic acids with substantial degree of steric encumbrance has been prepared via a novel variant of the Castagnoli-Cushman reaction of homophthalic anhydride (HPA) and various indolenines. The employment of a special kind of a cyclic imine component reaction allowed, for the first time, isolating a Mannich-type adduct between HPA and an imine
Facile and Convenient Syntheses of 6,11-Dihydro-5<i>H</i>-indeno[1,2-<i>c</i>]isoquinolin- 5-ones and 6,11-Dihydro-5<i>H</i>-indolo[3,2-<i>c</i>]isoquinolin-5-one
作者:Prakash G. Jagtap、Erkan Baloglu、Garry Southan、William Williams、Aloka Roy、Alexander Nivorozhkin、Nelson Landrau、Kevin Desisto、Andrew L. Salzman、Csaba Szabó
DOI:10.1021/ol050331m
日期:2005.4.1
[reaction: see text] The synthesis of 6,11-dihydro-5H-indeno[1,2-c]isoquinolin-5-ones from the base-promoted condensation reaction of homophthalic anhydride and 2-(bromomethyl)-benzonitrile and a convenient method for the synthesis of indolo[3,2-c]isoquinolinones are described.
Über einige Umsetzungen 3-substituierter Isocumarinderivate
作者:J. Knabe、K. Schaller
DOI:10.1002/ardp.19683010609
日期:——
Bei der Lithiumalanatreduktion von 3‐(2′‐Carbomethoxybenzyl)‐isocumarin (I) u. 3‐(2′‐Carbomethoxybenzyl)‐4‐carbomethoxyisocumarin (VIII) entsteht nicht das zu erwartende Triol VII; als Hauptprodukt erhält man das Halbacetal III, das sich mit Säuren leicht in das zyklische Spiroketal IV überführen läßt. — Durch methanolische Diazomethanlösung erfolgt Öffnung des Laktonringes der 3‐Benzyl‐isocumarinderivate
Reaction Discovery Using Microfluidic-Based Multidimensional Screening of Polycyclic Iminium Ethers
作者:Jennifer L. Treece、John R. Goodell、David Vander Velde、John A. Porco、Jeffrey Aubé
DOI:10.1021/jo100087h
日期:2010.3.19
Polycyclic iminium ethers are ambident electrophilic intermediates that react with a range of nucleophiles in a highly condition-dependent manner to afford densely functionalized lactams. In an effort to expand the scope of reactivity and assist in the generation of new chemotypes from these intermediates, several iminium ethers were Subjected to reaction screening using an automated microfluidics reaction platform. Application of tills approach led to the discovery of several interesting reaction pathways involving the iminium ether intermediates that will be described.
Reduction of 3-(carboxyaryl)isocoumarins with sodium borohydride
作者:V. V. Ishchenko、N. M. Voevoda、O. V. Shablykina、A. V. Turov、V. P. Khilya
DOI:10.1007/s10593-012-0896-3
日期:2012.1
Reduction of 3-(carboxyaryl)isocoumarins with sodium borohydride proceeds with formation of corresponding 3-carboxyaryl-3,4-dihydroisocoumarins or isomeric dihydrophthalides, 3-(2-carboxybenzyl)-2-benzofuran-1(3H)-ones. Derivatives at the carboxyl group of 3-carboxyaryl-3,4-dihydroisocoumarins and 3-(2-carboxybenzyl)-2-benzofuran-1(3H)-ones have been obtained.