3515-18-2Relevant articles and documents
Synthesis of functionalized 2-arylthiophenes with triarylbismuths as atom-efficient multicoupling organometallic nucleophiles under palladium catalysis
Rao, Maddali L. N.,Banerjee, Debasis,Dhanorkar, Ritesh J.
supporting information; experimental part, p. 1324 - 1330 (2011/07/07)
Atom-efficient cross-coupling reactions of functionalized 2-bromo- and 2-iodothiophenes have been demonstrated using triarylbismuths as atom-efficient multicoupling organometallic nucleophiles under palladium-catalyzed conditions. These couplings with various functionalized triarylbismuths proceeded smoothly to afford the corresponding functionalized 2-arylthiophenes in high yields. Georg Thieme Verlag Stuttgart · New York.
Heterocyclopolyaromatics, XV. On the Bromination, Acetylation, and Nitration of (all-αS)Cyclotetrathiophene
Kauffmann, Thomas,Mackowiak, Hans Peter
, p. 3714 - 3723 (2007/10/02)
Bromination, acetylation, and nitration of (all-αS)cyclotetrathiophene (1) yielded in experiments with different substrate reagent ratios the substitution products of well defined structures: 2-bromo- (2; 29percent) and 2,7,12,17-tetrabromo derivative (3; 82percent), 2-acetyl- (4; 45percent) and 2,7,12-triacetyl derivative (5; 4percent), 2-nitro- (9; 4percent) and 2,7,12-trinitro derivative (10; 8percent).In the acetylation and nitration reactions, two crystalline disubstitution products were formed additionally in each case.The position of the second substituent in these products is not clear today.
