- Synthesis of functionalized 2-arylthiophenes with triarylbismuths as atom-efficient multicoupling organometallic nucleophiles under palladium catalysis
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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.
- Rao, Maddali L. N.,Banerjee, Debasis,Dhanorkar, Ritesh J.
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supporting information; experimental part
p. 1324 - 1330
(2011/07/07)
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- Elongated phosphoranes by C-C coupling of haloaroylmethylidene-triphenylphosphoranes: Synthesis and applications
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Haloaroylmethylidenephosphoranes 3 can be subjected to Pd(o) mediated C-C coupling reactions to yield diaryl-, arylhetaryl-, dihetaryl, arylethenylaryl/hetaryl- and arylethynylaryl/hetaryl-carbonylmethylidenephosphoranes 4-9. Suzuki-Kumada reactions can a
- Thiemann, Thies,Umeno, Kuniharu,Wang, Jian,Tabuchi, Yumiko,Arima, Kazuya,Watanabe, Masataka,Tanaka, Yasuko,Gorohmaru, Hideki,Mataka, Shuntaro
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p. 2090 - 2110
(2007/10/03)
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- Heterocyclopolyaromatics, XV. On the Bromination, Acetylation, and Nitration of (all-αS)Cyclotetrathiophene
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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.
- Kauffmann, Thomas,Mackowiak, Hans Peter
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p. 3714 - 3723
(2007/10/02)
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