Fast [3+2] Cycloaddition Synthesis of (±) Pterocarpans under Microwave Irradiation
作者:Claiton P. Ventura、Iara Maira de O. Viana、Eruzia A.E. Ferreira、Rossimiriam P. de Freitas、Rosemeire B. Alves
DOI:10.2174/157017810791514896
日期:2010.7.1
Herein we describe a method for the fast cycloaddition reaction of 2H-chromenes with 2-methoxy-1,4- benzoquinones by microwave heating. Using this methodology we have synthesised seven pterocarpans derivatives, five of which are novel compounds. Microwave heating allows significant yield enhancements and reduction of reaction time when compared to traditional methodology.
Synthesis of 2,2-dimethylchromans by the hydrogenation of 2,2-dimethyl-2H-chromenes
作者:Albert L�vai
DOI:10.1007/bf00817602
日期:1992.5
2,2-Dimethylchromans 19-36 have been synthesized by the hydrogenation of 2,2-dimethyl-2 H-chromenes 1-18 in acetic acid solution in the presence of 10% Pd-C catalyst.
TIMAR, TIBOR;JASZBERENYI, J. CSABA;HOSZTAFI, SANDOR, ACTA CHIM. HUNG., 126,(1989) N, C. 149-156
作者:TIMAR, TIBOR、JASZBERENYI, J. CSABA、HOSZTAFI, SANDOR
DOI:——
日期:——
Neues Verfahren zur Herstellung von Chromen-Derivaten
申请人:ALKALOIDA VEGYéSZETI GYáR
公开号:EP0129636B1
公开(公告)日:1989-01-04
Synthesis of new pterocarpans and rapid O-alkylation under microwave irradiation
作者:E. A. Evangelista、M. R. C. Couri、D. S. Raslan、R. B. Alves