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[4+2] cycloaddition of ortho-quinone methides promoted by ionic liquids: an efficient and mild protocol for the synthesis of tetrahydropyranobenzopyrans

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Title [4+2] cycloaddition of ortho-quinone methides promoted by ionic liquids: an efficient and mild protocol for the synthesis of tetrahydropyranobenzopyrans
 
Creator Yadav, JS
Reddy, BVS
Sadashiv, K
Padmavani, B
 
Subject Chemistry, Applied; Chemistry, Organic
 
Description The stereoselective synthesis of trans-annelated pyrano[3,2-c]benzopyrans has been achieved by intramolecular [4 + 2] cycloaddition of o-benzo-quinone methides that are generated in situ from o-hydroxybenzaldehydes and unsaturated alcohols using an air- and moisture-stable ionic liquid, i.e., 1-butyl-3-methylimidazolium tetrafluoroborate [bmim]BF4 under mild and neutral conditions.
 
Publisher WILEY-V C H VERLAG GMBHWEINHEIMPO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
 
Date 2011-09-20T12:18:25Z
2011-09-20T12:18:25Z
2004
 
Type Article
 
Identifier ADVANCED SYNTHESIS & CATALYSIS
1615-4150
http://hdl.handle.net/123456789/16085
 
Language English