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Communication | Regular issue | Vol 45, No. 10, 1997, pp.1891-1894
Published online, 1st January, 1970
DOI: 10.3987/COM-97-7911
■ Syntheses of Novel Group 15 and 16 Thieno[2,3-b]-, Thieno[3,4-b]-, and Thieno[3,2-b]-heteroles

Shuji Yasuike, Jyoji Kurita, and Takashi Tsuchiya*

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

Abstract

Group 15 (P, As and Sb) and group 16 (S, Se, and Te) thieno[2,3-b]- (1), thieno[3,4-b]- (2), and thieno[3,2-b]heteroles (3) were prepared from the corresponding 1,4-dilithium intermediates, derived from (Z)-(β-bromo-β-trimethylsilylvinyl)thiophenes (6), (10), and (13) by treatment with tert-butyllithium, respectively. These thienoheteroles obtained are novel fused heterocyclic ring systems, except for thienothiophenes and thienoselenophenes.