Synthesis of 1-(Alkoxycarbonyl)methylene-1,3-dihydroisobenzofurans and 4-(Alkoxycarbonyl)benzo[c]pyrans by Palladium-Catalysed Oxidative Carbonylation of 2-Alkynylbenzyl Alcohols, 2-Alkynylbenzaldehydes and 2-Alkynylphenyl Ketones
作者:Alessia Bacchi、Mirco Costa、Nicola Della Cà、Marcella Fabbricatore、Alessia Fazio、Bartolo Gabriele、Cristina Nasi、Giuseppe Salerno
DOI:10.1002/ejoc.200300577
日期:2004.2
A direct synthesis of 1-(alkoxycarbonyl)methylene-1,3-dihydroisobenzofurans 2 and 5 and 4-(alkoxycarbonyl)benzo[c]pyrans 3 and 6 by oxidative Pd-catalysed cyclization/alkoxycarbonylation of 2-alkynylbenzyl alcohols 1, and of 2-alkynylbenzaldehydes or 2-alkynylphenyl ketones 4 is reported. Reactions were carried out in ROH or CH3CN/ROH (R = Me, iPr) as the solvent at 70−105 °C in the presence of catalytic
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
Versatile synthesis of (Z)-1-alkylidene-1,3-dihydroisobenzofurans and 1H-isochromenes by palladium-catalyzed cycloisomerization of 2-alkynylbenzyl alcohols
An easy synthesis of (Z)-1-alkylidene-1,3-dihydroisobenzofurans and 1H-isochromenes by palladium-catalyzedcycloisomerization of readily available 2-alkynylbenzyl alcohols under neutral conditions is reported. Reactions were carried out at 70–100°C in the presence of catalytic amounts (1–2%) of PdI2 in conjunction with 2 equiv. of KI for 1.5–24 h. The preference towards the 5-exo-dig cyclization mode
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.