Masanao Terashima
Hokkaido University
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Featured researches published by Masanao Terashima.
Heterocycles | 1987
Minoru Ishikura; I. Oda; Masanao Terashima
Reaction du borane du titre avec R-Br (R=aryl, heteryl, alcenyl) en presence de complexe de Pd0: obtention de R-4 isoquinoleines
Tetrahedron Letters | 1989
Kazue Ohkura; Koh-ichi Seki; Masanao Terashima; Yuichi Kanaoka
Abstract The electrophilic behavior of the reactive entity in the phtosubstitution of benzenes with 2-iodopyridine was found to be ascribable to the intermediary 2-pyridyl cation, rather than to the electrophilic 2-pyridyl radical.
Tetrahedron Letters | 1992
Minoru Ishikura; Masanao Terashima
Abstract A novel one-pot procedure for [ a ]-annelated indole via cyclic trialkyl(indol-2-yl)borate is described.
Heterocycles | 1990
Kazue Ohkura; Koh-ichi Seki; Masanao Terashima; Y. Kanaoka
Photoreaction of 2-, 3-, and 4-iodoquinolines with five membered heterocycles (i.e. 1-methylpyrrole, pyrrole, furan and thiophene) afforded the corresponding n(2-heteroaryl)quinolines (n=2, 3, 4) in appreciable yields.
Heterocycles | 1994
Koh-ichi Seki; Kazue Ohkura; Masanao Terashima; Yuichi Kanaoka
The reactions of the sodium salts of indoles with 2- and 4-fluoropy- ridines afforded the corresponding N-pyridylindoles in good yields, whereas the reaction with 3-fluoropyridine gave no coupling product
Heterocycles | 1992
Masanao Terashima; Yohko Takeda; Hironobu Nishiyama; Minoru Ishikawa; Kazuyuki Kamata
Utilization of 1-(2-oxazolinyl) indoles, prepared from 1-cyano compounds, to the synthesis of 2-substituted indoles was investigated
Advances in Heterocyclic Chemistry | 1989
Masanao Terashima; Minoru Ishikura
Publisher Summary The enormous developments in the chemistry of organoboranes and related compounds during the last two decades have contributed greatly to the recent progress of synthetic organic chemistry. The chemistry of boron-containing heterocycles is diverse. A variety of heteroaromatic compounds having a boron atom in the ring, borazaromatics for example, has been investigated, mostly due to their interesting physical and chemical properties. A number of derivatives of boron have been synthesized and evaluated for the potential use in cancer therapy. In some cases, the reaction of heterocycles with various boron reagents involves their derivatives as crucial reaction intermediates. This chapter deals with the chemistry of heteroaromatic compounds directly substituted on a ring carbon with a boron atom.
Journal of The Chemical Society, Chemical Communications | 1982
Minoru Ishikura; Miwako Mori; Masanao Terashima; Yoshio Ban
A New method for the preparation of pyrrolo [1,4]benzodiazepinone derivatives using palladium-catalysed carbonylation has led to a formal synthesis of anthramycin.
Heterocycles | 1993
Masanao Terashima; Yohko Takeda; Akiko Kikuchi
2-Aroyl-1H-indoles were directly obtained by the reaction of 1-(N-aroylcarbamoyl) indoles, prepared from 1-(2-oxazolinyl) indole and aroyl chlorides, with LDA
Heterocycles | 1990
Masanao Terashima; Minoru Ishikura
The conjugate addition reaction of triethyl(1- methyl-indol-2-yl) borate to 2-cycloalkenone could be effected with a catalytic amount of vinyloxyborane