通过各自的3-芳基-4-乙氧基羰基呋喃(3a)的脱甲基环化反应,合成了各种1,3-二甲基和1-甲基-3-苯基呋喃[3,4- c ]香豆素(5a-h和6a-h)。-h和4a-h)。这些乙氧基羰基呋喃是通过使适当的1-芳基-2-硝基-丙-1-烯(1a-h)与乙酰乙酸乙酯或苯甲酰基乙酸乙酯在Nef反应条件下反应制备的。
作者:Dinker I. Brahmbhatt、Jitendra M. Gajera、Chirag N. Patel、Vishwesh P. Pandya、Urvish R. Pandya
DOI:10.1002/jhet.5570430643
日期:2006.11
Various 1,3-dimethyl and 1-methyl-3-phenylfuro[3,4-c]coumarins (5a-h and 6a-h) have been synthesized by demethylation cyclization of the respective 3-aryl-4-ethoxycarbonyl furans (3a-h and 4a-h). These ethoxycarbonyl furans were prepared by reacting appropriate 1-aryl-2-nitro-prop-1-ene (1a-h) with ethyl acetoacetate or ethyl benzoylacetate under Nef reaction condition.
通过各自的3-芳基-4-乙氧基羰基呋喃(3a)的脱甲基环化反应,合成了各种1,3-二甲基和1-甲基-3-苯基呋喃[3,4- c ]香豆素(5a-h和6a-h)。-h和4a-h)。这些乙氧基羰基呋喃是通过使适当的1-芳基-2-硝基-丙-1-烯(1a-h)与乙酰乙酸乙酯或苯甲酰基乙酸乙酯在Nef反应条件下反应制备的。