Thiopyrano[1]benzothiophens. Synthesis of 1-phenyl-3H-thiopyrano-[3,4-b][1]benzothiophen-3-thione 9,9-dioxide and related compounds
作者:Katherine Buggle、Úna Ní Ghógaín、Michael Nangle、Patrick MacManus
DOI:10.1039/p19830001427
日期:——
The title compound (3a) was prepared by the reaction of 2-benzoylbenzo[b]thiophen-3(2H)-one 1,1-dioxide (1) with tetraphosphorus decasulphide, acetonitrile, and sodium hydrogen carbonate. The structure was confirmed by an alternative synthesis from ethyl 3-benzo[b]thienylacetate. The isomeric 4-phenyl-2H-thiopyrano[3,2-b][1]benzothiophen-2-thione 5,5-dioxide (2a) and a number of analogues of (3a) and
通过使2-苯甲酰基苯并[ b ]噻吩-3(2H)-1,1,1-二氧化物(1)与十磷四磷,乙腈和碳酸氢钠反应制备标题化合物(3a)。通过3-苯并[ b ]噻吩基乙酸乙酯的另一合成方法证实了该结构。制备了4-苯基-2 H-硫代吡喃并[3,2- b ] [1]苯并噻吩-2-硫酮5,5-二氧化物的异构体(2a)以及许多类似物(3a)和(2a)。