Molecular iodine catalyst promoted synthesis of chromans and 4-aryl-3,4-dihydrobenzopyran-2-ones via [3+3] cyclocoupling

Naik, Mayuri M.; Kamat, D.P.; Tilve, S.G.; Kamat, V.P.

dc.contributor.author	Naik, Mayuri M.
dc.contributor.author	Kamat, D.P.
dc.contributor.author	Tilve, S.G.
dc.contributor.author	Kamat, V.P.
dc.date.accessioned	2015-06-04T04:22:27Z
dc.date.available	2015-06-04T04:22:27Z
dc.date.issued	2014
dc.identifier.citation	Tetrahedron. 70(34); 2014; 5221-5233.	en_US
dc.identifier.uri	http://dx.doi.org/10.1016/j.tet.2014.05.093
dc.identifier.uri	http://irgu.unigoa.ac.in/drs/handle/unigoa/3057
dc.description.abstract	Molecular iodine as an inexpensive catalyst is described in the construction of 2-substituted or 2,2-disubstituted chromans and 4-aryl-3,4-dihydrobenzopyran-2-ones via [3+3] cyclocoupling. For the synthesis of chromans, phenols and allylic alcohols were refluxed in chloroform in presence of 20 mol percent I2 while [3+3] cyclocoupling of phenols and cinnamic acids proceeded to give 4-aryl-3,4-dihydrobenzopyran-2-ones using 30 mol percent I2. Later reaction occurs via a tandem hydroarylation-esterification process at 120-130 degrees C under solvent free conditions. Chromans were obtained in 20-92 percent yields and substituted 4-aryl-3,4-dihydrobenzopyran-2-ones were obtained in 5-85 percent yields.	en_US
dc.publisher	Elsevier	en_US
dc.subject	Chemistry	en_US
dc.title	Molecular iodine catalyst promoted synthesis of chromans and 4-aryl-3,4-dihydrobenzopyran-2-ones via [3+3] cyclocoupling	en_US
dc.type	Journal article	en_US
dc.identifier.impf	y