Synthesis and characterization of dimers, trimers, and tetramers of 3,6-Dimethylthieno[3,2-b]thiophene and 3,6-Dimethylselenolo[3,2-b]selenophene

Palladium‐Catalyzed Carbonylation of 2‐Haloselenophenes: Synthesis of Selenophene‐2‐carboxamides, Selenophene‐2,5‐dicarboxamides and N,N′‐Bridged Selenophene‐2‐carboxamides

“…of n-butyllithium, in the presence of TMEDA, followed by reaction with iodine. [10] Conversely, 2-bromoselenophene (1b) was prepared via bromination of selenophene with NBS in a mixture of CH 2 Cl 2 and AcOH [11] (Scheme 2). Scheme 2.…”

Chromium and Tungsten Carbene Complexes of Thieno[3,2-b]thiophene

“…Crystallographic data (excluding structure factors) for the structures reported in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary material publication nos. CCDC-142023 (1) and CCDC-142024 (2). Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge CB21EZ, UK [Fax: (internat.)…”

“…[2] Research in this area has unfortunately been impeded by the lack of convenient synthetic methods. Since the discovery of the first stable transition metal carbene complex by Fischer and Maasböl in 1964, [3] research in this field has been extensive with wide application possibilities.…”

Fused Thiophenes and Some Oligomers and Polymers Therefrom

“…The dimer 52 and the tetramer TT 55 were made from 47 (Scheme 14), thus bromination was followed by coupling using Ni as a catalyst to yield the dimer 52. The tetramer 55 was obtained, following a similar methodology, via bromination of 52 then cross-coupling with its Grignard derivative 54 in the presence of NiCl 2 (dppp) [35].…”