.alpha.-Adrenoceptor reagents. 2. Effects of modification of the 1,4-benzodioxan ring system on .alpha.-adrenoreceptor activity
摘要:
Modification of the 1,4-benzodioxan ring present in RX 781094 has not previously been considered. This paper describes a number of analogues of this ring system, including compounds in which one of the oxygen atoms has been replaced by a methylene group and also those in which the ring size has been changed to give, for example, furan and thiophene derivatives. The dihydrobenzofuranylimidazoline compound 7 is the only analogue possessing presynaptic antagonist potency potency and selectivity comparable to that of 1. In view of this result, a number of derivatives was prepared to determine the structure-activity relationships within this series. Many derivatives, as well as the parent compound 7, were found to possess presynaptic alpha 2-adrenoreceptor antagonist and postsynaptic alpha 1-adrenoreceptor partial agonist properties. Two of the selective presynaptic antagonists, 13 and 14 possess greater potency and selectivity than that possessed by 1. The 5-chloro derivative 25 is twice as potent as after oral administration but only about half as potent when given intravenously.
Falcipain Inhibitors: Optimization Studies of the 2-Pyrimidinecarbonitrile Lead Series
作者:Jose M. Coterón、David Catterick、Julia Castro、María J. Chaparro、Beatriz Díaz、Esther Fernández、Santiago Ferrer、Francisco J. Gamo、Mariola Gordo、Jiri Gut、Laura de las Heras、Jennifer Legac、Maria Marco、Juan Miguel、Vicente Muñoz、Esther Porras、Juan C. de la Rosa、Jose R. Ruiz、Elena Sandoval、Pilar Ventosa、Philip J. Rosenthal、Jose M. Fiandor
DOI:10.1021/jm100556b
日期:2010.8.26
were studied as potential falcipaininhibitors and therefore potential antiparasitic lead compounds, with the 5-substituted-2-cyanopyrimidine chemical class emerging as the most potent and promising leadseries. Through a sequential leadoptimization process considering the different positions present in the initial scaffold, nanomolar and subnanomolar inhibitors at falcipains 2 and 3 were identified
An efficient synthesis of benzofuran derivatives under conventional/non-conventional method
作者:Suryakant B. Sapkal、Kiran F. Shelke、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.1016/j.cclet.2010.06.038
日期:2010.12
Abstract 1-Methyl-3-ethyl imidazolium bromide [meim]Br/basic alumina (Al 2 O 3 ) has been found to promote the cyclocondensation of chloroacetone/chloroethyl acetate with salicylaldehydes underconventional as well as microwave irradiation to yield benzofuran derivatives.
摘要发现1-甲基-3-乙基溴化咪唑鎓[meim] Br /碱性氧化铝(Al 2 O 3)在常规和微波辐射下可促进氯丙酮/氯乙酸乙酯与水杨醛的环缩合反应,生成苯并呋喃衍生物。
Tandem Synthesis of 2-Carboxybenzofurans <i>via</i> Sequential Cu-Catalyzed C–O Coupling and Mo(CO)<sub>6</sub>-Mediated Carbonylation Reactions
作者:Qinliang Mo、Nan Sun、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1021/acs.joc.0c01620
日期:2020.9.4
A modular tandem synthesis of 2-carboxybenzofurans from 2-gem-dibromovinylphenols has been established based on a sequence of Cu-catalyzed intramolecular C–O coupling and Mo(CO)6-mediated intermolecular carbonylationreactions. This protocol allowed one-step access to a broad variety of functionalized benzofuran-2-carboxylic acids, esters, and amides in good to excellent yields under Pd- and CO gas-free