825654-54-4Relevant articles and documents
Reductive ring closure methodology toward heteroacenes bearing a dihydropyrrolo[3,2- B ]pyrrole core: Scope and limitation
Qiu, Li,Wang, Xiao,Zhao, Na,Xu, Shiliang,An, Zengjian,Zhuang, Xuhui,Lan, Zhenggang,Wen, Lirong,Wan, Xiaobo
, p. 11339 - 11348 (2015/01/09)
A newly developed reductive ring closure methodology to heteroacenes bearing a dihydropyrrolo[3,2-b]pyrrole core was systematically studied for its scope and limitation. The methodology involves (i) the cyclization of an o-aminobenzoic acid ester derivative to give an eight-membered cyclic dilactam, and (ii) the conversion of the dilactams into the corresponding diimidoyl chloride, which undergoes (iii) reductive ring closure to install the dihydropyrrolo[3,2-b]pyrrole core. The first step of the methodology plays the key role due to its substrate limitation, which suffers from the competition of oligomerization and hydrolysis. All the dilactams could successfully convert to the corresponding diimidoyl chlorides, most of which succeeded to give the dihydropyrrolo[3,2-b]pyrrole core. The influence of the substituents and the elongation of conjugated length on the photophysical properties of the obtained heteroacenes were then investigated systematically using UV-vis spectroscopy and cyclic voltammetry. It was found that chlorination and fluorination had quite a different effect on the photophysical properties of the heteroacene, and the ring fusing pattern also had a drastic influence on the band gap of the heteroacene. The successful preparation of a series of heteroacenes bearing a dihydropyrrolo[3,2-b]pyrrole core would provide a wide variety of candidates for further fabrication of organic field-effect transistor devices.
ALKYLIDENE TETRAHYDRONAPHTHALENE DERIVATIVES, METHOD FOR THEIR PRODUCTION AND THEIR USE AS ANTI-INFLAMMATORY AGENTS
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Page/Page column 43-45, (2010/10/20)
The invention relates to alkylidene tetrahydronaphthalene derivatives of general formula (I), to methods for their production and to their use as anti-inflammatory agents.
REARRANGED PENTANOLS, A METHOD FOR THE PRODUCTION THEREOF, AND THEIR USE AS ANTIPHLOGISTICS
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Page/Page column 29, (2008/06/13)
The invention relates to compounds of formula (I), to a method for the production thereof, and to their use as antiphlogistics.