efficient, regioselective Cu(OTf)2-catalyzed 5-exo-dig intramolecular hydroalkoxylation of 2-(ethynyl)benzyl alcohol, which provides a concise access to functionalized phthalan in high yields has been developed. A wide range of substrates possessing terminal, internal, and heteroaromatic alkynes can be efficiently transformed into the targeted phthalans. Substrates with primary, secondary, and tertiary benzyl
Mothanolysis of 2-(2-substituted ethynyl)benzonitriles based on the nature of substituents gave 5-exo product, isoindolones and 6-endo product, isoquinolones, respectively. When a bulky substituent, such as tert-butyl group, was employed in this cyclization reaction, a 5-exo adduct was obtained. Phenyl and thienyl groups which can stabilize the alpha-anion affect the cyclization reaction to produce the 5-exo adducts. Pyridinyl and pyrazinyl groups can also stabilize the a-anion, but the formation of a more stable intermediate by coordination of sodium with nitrogen atom leads to the 6-endo products. (C) 2002 Elsevier Science Ltd. All rights reserved.
Regioselective synthesis and evaluation of 3-alkylidene-1, 3-dihydroisobenzofurans as potential antidepressant agents
作者:C PRAVEEN、C IYYAPPAN、K GIRIJA、K SURESH KUMAR、P T PERUMAL
DOI:10.1007/s12039-011-0150-z
日期:2012.3
3-Alkylidene-1,3-dihydroisobenzofurans exhibited moderate antidepressant activity as evaluated by forced swim and tail suspension test methods. Virtual screening was carried out by docking the designed compounds into the serotonin binding sites of arabinase protein to predict the analogue binding mode of the compounds to the SSRIs.