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Efficient synthesis of biscarbazoles by palladium-catalyzed twofold C-N coupling and C-H activation reactions.
A new and efficient strategy for the synthesis of 3,9'- and 2,9'-biscarbazoles was developed. Our strategy relies on the cyclization of 1,1'-biphenyl-2,2'-diyl bis(trifluoromethanesulfonate) with 4-Expand
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Metal Ion Complexation of Poly(Ether)Urethanes
The interaction of low molecular weight models of poly(ether)urethanes (PEUs), used in various biomedical applications, with metal ions was studied. Interaction of calcium ion and silver ion withExpand
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A new dimeric carbazole alkaloid from Glycosmis stenocarpa roots.
A new dimeric pyranocarbazole alkaloid, bisisomahanine (1), was isolated from the roots of Glycosmis stenocarpa (DRAKE) TAN., along with two known monomeric carbazole alkaloids, murrayafoline-A (2)Expand
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Novel synthesis of 5-methyl-5,10-dihydroindolo[3,2-b]indoles by Pd-catalyzed C-C and two-fold C-N coupling reactions.
A series of 5,10-dihydroindolo[3,2-b]indoles was successfully prepared by an efficient two-step strategy based on site-selective Pd-catalyzed cross-coupling reaction with N-methyl-2,3-dibromoindoleExpand
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Efficient synthesis of thieno[3,2-b:4,5-b']diindoles and benzothieno[3,2-b]indoles by Pd-catalyzed site-selective C-C and C-N coupling reactions.
Heteroacenes (thieno[3,2-b:4,5-b']diindoles and benzothieno[3,2-b]indoles) were efficiently synthesized from tetrabromothiophene and 2,3-dibromobenzothiophene in two steps, respectively. In the firstExpand
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Palladium catalyzed synthesis and physical properties of indolo[2,3-b]quinoxalines.
A series of indolo[2,3-b]quinoxaline derivatives were efficiently synthesized from 2,3-dibromoquinoxaline by two pathways. A one-pot approach using Pd-catalyzed two-fold C-N coupling and C-HExpand
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Efficient synthesis of α- and δ-carbolines by sequential Pd-catalyzed site-selective C-C and twofold C-N coupling reactions.
Two concise and efficient approaches were developed for the synthesis of α- and δ-carboline derivatives. The success of the synthesis relies on site-selective Suzuki-Miyaura reactions ofExpand
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Efficient one-pot synthesis of 5-perfluoroalkylpyrazoles by cyclization of hydrazone dianions.
A highly selective and efficient method for the synthesis of 5-trifluoromethylated and 5-perfluoroalkylated pyrazoles has been developed which relies on the cyclization of hydrazine dianions withExpand
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Synthesis and Properties of 5,7-Dihydropyrido[3,2-b:5,6-b′]diindoles
5,7-Dihydropyrido[3,2-b:5,6-b′]diindoles were prepared by a highly efficient two-step synthesis that involved a site-selective Suzuki coupling reaction of 2,3,5,6-tetrabromopyridine and a subsequentExpand
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