One pot conversion of azido arenes to N-arylacetamides and N-arylformamides: synthesis of 1,4-benzodiazepine-2,5-diones and fused [2,1-b]quinazolinones
摘要:
Sodium iodide in acidic media has been employed for the synthesis of N-arylformamides and N-arylacetamides. The NaI/acetic acid reagent system has also been extended for the synthesis of 1,4-benzodiazepine-2,5-diones, pyrrolo[2,1-c][1,4]benzodiazepine-5,11-diones, and fused [2,1-b]quinazolinones. (C) 2004 Published by Elsevier Ltd.
triflates catalyze the chemoselective reduction of aromatic azides to the corresponding amines in combination with sodium iodide. This mild chemoselective method has been applied to the synthesis of various aryl amines, C2‐azido‐substituted pyrrolo[2,1‐c][1,4]benzodiazepines, and fused[2,1‐b]quinazolinones by an intramolecular azido reduction tandem cyclization reaction. Interestingly, this methodology
铝和ado三氟甲磺酸盐与碘化钠一起催化将芳族叠氮化物化学选择性还原为相应的胺。这种温和的化学选择性方法已应用于各种芳基胺的合成,C2叠氮基取代的吡咯并[2,1- c ^ ] [1,4]苯二氮,和稠合[2,1- b通过分子内还原叠氮]喹唑啉酮串联环化反应。有趣的是,这种方法选择性地还原了芳基叠氮化物,提高了产率,并且比以前的策略在较短的反应时间内进行。已对机理进行了研究,并通过ESI-MS在线监测反应来拦截和表征与这种选择性转化有关的中间体。
Nitrogen bridgehead compounds. 66. Bronchodilator nitrogen bridgehead compounds with a pyrimidinone moiety
New types of bronchodilator agents, bi- and tricyclic nitrogenbridgeheadcompounds with a pyrimidin-4(3H)-one ring, were synthesized and evaluated for bronchodilator activity against serotonin-, histamine-, and acetylcholine-induced spasms in the guinea pig Konzett-Rössler test. The structure-activity relationships are discussed. The effects of some bi- and tricyclic derivatives on the human bronchus
A Polymer-Assisted Solution-Phase Strategy for the Synthesis of Fused [2,1-<i>b</i>]Quinazolinones and the Preparation of Optically Active Vasicinone
作者:Ahmed Kamal、V. Devaiah、N. Shankaraiah、K. Reddy
DOI:10.1055/s-2006-951482
日期:2006.9
An efficient preparation of fused [2,1-b]quinazolinones has been developed utilizing polymer-supported reagents. (±)-Vasicinone was converted into its dione by oxidation with poly (4-vinylpyridiniumdichromate). An efficient method has been developed for the synthesis of (d)- and (l)-vasicinone via asymmetric reduction of pyrrolo[2,l-b]quinazoline-3,9-dione by employing NaBH 4 /Me 3 SiCl as the reducing
Quinazoline derivatives as acetylcholinesterase inhibitors
申请人:Warner-Lambert Company
公开号:US05486512A1
公开(公告)日:1996-01-23
A method of treating cognitive deficiencies is described by administering a quinazoline derivative of the general formula ##STR1## wherein A represents ##STR2## in which n is 1-10, P is a bond or (CH.sub.2).sub.m in which m is 0-10, and M is .dbd.O, .dbd.S, .dbd.NR, .dbd.CRR', ##STR3## novel compounds of the above are also described as well as methods of manufacture and pharmaceutical compositions.
[EN] QUINAZOLINE DERIVATIVES AS ACETYLCHOLINESTERASE INHIBITORS
申请人:WARNER-LAMBERT COMPANY
公开号:WO1993003034A1
公开(公告)日:1993-02-18
(EN) A method of treating cognitive deficiencies is described by administering a quinazoline derivative of general formula (I) wherein A represents (IIa), (IIb), (IIc), (IId) or (IIe) in which n is 1-10, P is a bond or (CH2)m in which m is 0-10, and M is =O, =S, =NR, =CRR', (III); novel compounds of the above are also described as well as methods of manufacture and pharmaceutical compositions.(FR) L'invention décrit un procédé de traitement de déficiences cognitives au moyen de l'administration d'un dérivé de quinazoline représenté par la formule générale (I) dans laquelle A représente (IIa), (IIb), (IIc), (IId) ou (IIe) où n est 1-10, P représente une liaison ou (CH2)m où m est 0-10 et M représente =O, =S, =NR, =CRR', (III); l'invention décrit également de nouveaux composés comportant ledit dérivé, ainsi que des procédés de préparation et des compositions pharmaceutiques.