The 1,3-dihydroxy-5-oxonia-11-azabenzo[b]fluorene cation; a synthetic nitrogenous anthocyanidin
作者:Francis M. Dean、Chachanat Patamapongse
DOI:10.1039/p19740000952
日期:——
The chalcone formed from salicylaldehyde and indoxyl cyclises in warm trifluoroacetic acid to yield the 5-oxonia-11-azabenzo[b]fluorene cation (Ib). The constitution of this has been confirmed by oxidation with hydrogen peroxide to the related flavone, [1]benzopyrano[3,2-b]indol-11-one (XI), also accessible by heating 2′-nitroflavone with ethyl phosphite.
在温暖的三氟乙酸中,由水杨醛和吲哚基环化形成的查耳酮,生成5-氧代十一氮杂氮杂苯并[ b ]芴阳离子(I b)。通过用过氧化氢氧化成相关的黄酮[1]苯并吡喃并[3,2 - b ]吲哚-11-酮(XI),也可以通过将2'-硝基黄酮与亚磷酸乙酯加热而得到证实。