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Communication | Regular issue | Vol 45, No. 10, 1997, pp.1899-1902
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7930
Syntheses of Novel Dithieno[2,3-b;3’,2’-f]- and Dithieno[3,4-b;3’,4’-f]heteroepines Containing Group 14, 15, and 16 Heavier Elements

Shuji Yasuike, Fumio Nakashima, Jyoji Kurita, and Takashi Tsuchiya*

*School of Pharmacy, Hokuriku University, 3-Ho, Kanagawa machi, Kanazawa 920-1181, Japan


The dithieno[2,3-b;3’,2’-f]- (3) and dithieno[3,4-b;3’,4’-f]heteroepines (4) containing Group 14 (Si, Ge, and Sn), Group 15 (P, As, Sb, and Bi) and Group 16 (S, Se, and Te) elements were prepared from 2-bromo-3-iodothiophene and 3-bromo-4-iodothiophene via four steps, respectively, and thermal stabilities of these novel heterocyclic ring systems were examined.