SYNTHESIS OF α-THIOPHENE OLIGOMERS VIA ORGANOTIN COMPOUNDS
作者:
MarwanR. Kamal,
SamirA. Al-taweel,
MustafaM. El-abadelah,
KhalidM. Abu Ajaj,
期刊:
Phosphorus, Sulfur, and Silicon and the Related Elements
(Taylor Available online 1997)
卷期:
Volume 126,
issue 1
页码: 65-74
ISSN:1042-6507
年代: 1997
DOI:10.1080/10426509708043546
出版商: Taylor & Francis Group
关键词: Functionalized α-thiophene oligomers;synthesis;2-stannylthiophenes
数据来源: Taylor
摘要:
A versatile synthetic route involving the use of organotin compounds has been applied for the preparation of functionalized oligothiophenes. Thus, substituted α-bithiophenes have been synthesized via the coupling reaction of 2-bromothiophenes with 2-trimethylstannylthiophene. The latter reagent couples with 2,5-dibromothiophenes to give the α-terthiophenes which are also accessible through the reaction of 5-trimethylstannyl-α-bithiophene with 2-bromothiophenes. 2,5-Bis(trimethylstannyl) thiophene and 5,5′-bis(trimethylstannyl)-α-bithiophene react with 2-bromothiophenes to give α-terthiophenes and α-quaterthiophenes, respectively. α-Quaterthiophene is also produced via the reaction of 5-trimethylstannylthiophene with 5,5′- dibromo-α-bithiophene. The coupling reaction of 5-tnmethylstannyl-α-bithiophene with 2.5-dibromothiophene affords the α-quinquethiophene. The structures of the new compounds were confirmed by elemental analysis, Mass spectrometry,1H- and13CNMR spectral data.
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