Reaction of 1,3,4,6-tetrakis(alkylthio)-2λ<sup>4</sup>δ<sup>2</sup>-thieno[3,4-c]thiophenes with trifluoroacetic acid and with Vilsmeier reagent, and synthesis of new 2λ<sup>4</sup>δ<sup>2</sup>-thieno[3,4-c]thiophene derivatives
作者:Akira Tsubouchi、Noboru Matsumura、Hiroo Inoue、Kazunori Yanagi
DOI:10.1039/p19910000909
日期:——
trifluoroacetic acid and water resulted in the formation of thieno[3,4-c] thiophen-1(3H)-ones 9–12. Compounds 1a and 1b reacted with Vilsmeier reagent to give mono- and di-formyl-substituted 2λ4δ2-thieno[3,4-c]thiophenes 15a, 15b and 16b. Furthermore, formyl-substituted derivatives 15a and 16b reacted with malononitrile, ethyl cyanoacetate, and N,N-dimethylhydrazine to give the condensed compounds 17–21
2λ 4 δ 2 -噻吩并[3,4- c ^ ]噻吩1A,1C和1D具有叔丁硫基的取代基与三氟乙酸反应,得到硫酮衍生物3a中,3 ' ç和3 ' d通过中介形成的质子加合物的,1 H-噻吩并[3,4- c ]噻吩三氟乙酸盐,然后裂解Bu t -S键。硫酮的治疗3a中与氢化钠,然后烷基碘,得到2λ 4 δ 2噻吩并[3,4Ç ]噻吩1C和5 - 7。2λ的反应4 δ 2 -噻吩并[3,4- c ^ ]噻吩1A - ë用三氟乙酸和水导致的噻吩并形成[3,4 Ç ]噻吩-1(3 H ^) -酮9 - 12。化合物1A和1B与Vilsmeier试剂,得到单-和二-甲酰基-取代的2λ反应4 δ 2 -噻吩并[3,4- c ^ ]噻吩15A,15B和16B中。此外,甲酰基取代的衍生物15A和16B与丙二腈,氰基乙酸乙酯,并反应Ñ,Ñ -dimethylhydrazine,得到稠合的化合物17 - 21。