涉及一种新颖氮杂普林斯型环化反应Ñ -acyliminium离子和酰胺被报告四氢嘧啶并[2,1-的合成一个]异吲哚-2,6-二酮和6,6-一个-dihydroisoindolo [2,1-一个]喹唑啉-5,11-二酮衍生物,产率极好。该策略的特点是试剂价格低廉,反应条件温和,N-杂环骨架的无金属合成。此外,合成后的修饰导致其前所未有的三唑、四环二氮杂环戊二烯[ def ]菲-1,4(9 a 1 H )-二酮和羰基衍生物的形成。
acidic catalyst for the synthesis of isoindolo[2,1-a]quinazoline-5,11-dione derivatives under green conditions. Thus the Wang-OSO3H catalyzed MCR of isatoic anhydride, 2-formylbenzoic acid and various amines in pure water afforded a range of desired product in good to excellent (86-94%) yield. The methodology can be performed under open air and is amenable for scale-up synthesis. The catalyst can be recovered
A new three-component reaction: green synthesis of novel isoindolo[2,1-a]quinazoline derivatives as potent inhibitors of TNF-α
作者:K. Siva Kumar、P. Mahesh Kumar、K. Anil Kumar、M. Sreenivasulu、Ahamed A. Jafar、D. Rambabu、G. Rama Krishna、C. Malla Reddy、Ravikumar Kapavarapu、K. Shivakumar、K. Krishna Priya、Kishore V. L. Parsa、Manojit Pal
DOI:10.1039/c1cc10715a
日期:——
Concurrent construction of five and six membered fused N-heretocyclic ring was achieved via a conceptually new three-component reaction affording 6,6a-dihydroisoindolo[2,1-a]quinazoline-5,11-diones as novel inhibitors of TNF-alphain vitro. This represents one of the few examples of direct TNF-alpha inhibition by small molecules.
β-Cyclodextrin mediated MCR in water: synthesis of dihydroisoindolo[2,1-a]quinazoline-5,11-dione derivatives under microwave irradiation
作者:G. Rajeshwar Reddy、T. Ram Reddy、R. Gangadhara Chary、Suju C. Joseph、Soumita Mukherjee、Manojit Pal
DOI:10.1016/j.tetlet.2013.09.138
日期:2013.12
We report a faster and greener approach for the synthesis of dihydroisoindolo[2,1-a]quinazoline-5,11-dione derivatives of potential pharmacological interest via a beta-CD mediated MCR in water under microwave irradiation. (C) 2013 Elsevier Ltd. All rights reserved.
Metal–Catalyst-Free Green and efficient synthesis of five and six membered fused N-heterocyclic quinazoline derivatives
An efficient and green approach has been developed for the construction of Tetracyclic nitrogen-bridgehead compounds were designed and synthesized in good yields. The reaction of easily prepared 3-bromoisobenzofuran-1(3H)-one with isatoic anhydride and amines gave the desired isoindoloquinazolinone derivatives in moderate to good yields. It is also amenable for scale-up. (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis of pyrimido[2,1-<i>a</i>]isoindolone and isoindolo[2,1-<i>a</i>]quinazolinone <i>via</i> intramolecular aza-Prins type reaction
作者:Subhamoy Biswas、Bikoshita Porashar、Pallav Jyoti Arandhara、Anil K. Saikia
DOI:10.1039/d1cc04554g
日期:——
A novel aza-Prins type cyclizationreaction involving N-acyliminium ions and amides is reported for the synthesis of tetrahydropyrimido[2,1-a]isoindole-2,6-dione and 6,6a-dihydroisoindolo[2,1-a]quinazoline-5,11-dione derivatives in excellent yields. The strategy features inexpensive reagents, mild reaction conditions, and metal-free synthesis of N-heterocyclic frameworks. Further, post-synthetic modification
涉及一种新颖氮杂普林斯型环化反应Ñ -acyliminium离子和酰胺被报告四氢嘧啶并[2,1-的合成一个]异吲哚-2,6-二酮和6,6-一个-dihydroisoindolo [2,1-一个]喹唑啉-5,11-二酮衍生物,产率极好。该策略的特点是试剂价格低廉,反应条件温和,N-杂环骨架的无金属合成。此外,合成后的修饰导致其前所未有的三唑、四环二氮杂环戊二烯[ def ]菲-1,4(9 a 1 H )-二酮和羰基衍生物的形成。