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1.
論文 |
Kawasaki, Toshiya ; Kodama, Atsushi ; Nishida, Tokiko ; Shimizu, Kazuhisa ; Somei, Masanori
概要:
金沢大学大学院自然科学研究科生理活性物質科学<br />金沢大学薬学部
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2.
論文 |
Somei, Masanori ; Kawasaki, Toshiya ; Ohta, Toshiharu
概要:
金沢大学大学院自然科学研究科生理活性物質科学<br />金沢大学薬学部
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3.
論文 |
Somei, Masanori ; Kawasaki, Toshiya
概要:
The first total synthesis of bipolaramide was achieved in 47% overall yield from (2S__-)-2, 3-dihydroindole-2-carboxylic acid in three steps, utilizing thallium chemistry. Some derivatives, with dihalogeno or dialkenyl substituents at the 4
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and 11 positions of (6aS__--cis)-6a, 7, 13a, 14-tetrahydropyrazino[1, 2-a : 4, 5-a']diindole-6, 13-dione have also prepared
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4.
論文 |
Somei, Masanori ; Kawasaki, Toshiya
概要:
金沢大学大学院自然科学研究科生理活性物質科学<br />金沢大学薬学部<br />The first and simple total synthesis of bipolaramide was achieved in 31 % overa
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ll yield from (2S)-2,3-dihydroindole-2-carboxylic acid in three (or two) steps. Derivatives of bipolaramide having halogen, alkenyl, nitro, or azido substitueras were also prepared.
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5.
論文 |
Somei, Masanori ; Kawasaki, Toshiya ; Shimizu, Kazuhisa ; Fukui, Yoshikazu ; Ohta, Toshiharu
概要:
Methyl 1-hydroxyindole-3-acetate, (±)-2-acetoamino-3-(10hydroxyindol-3-yl)propanol, N__-b-acetyl-1-hydroxytryptamine, (±
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)- and (S__-)-(+)-N__-b-acetyl-1-hydroxytryptophan methyl ester, which are needed for inspecting our hypothesis regarding the metabolism of tryptophan, were prepared for the first time. The structural proof of (±)-N__-b-acetyl-1-hydroxytryptophan methyl ester by X-ray crysatllographic analysis is also reported.
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6.
論文 |
Yamada, Koji ; Kawasaki, Toshiya ; Fujita, Tomomi ; Somei, Masanori
概要:
金沢大学大学院自然科学研究科生理活性物質科学<br />金沢大学薬学部<br />Nucleophilic substitution reaction of 1-methoxy-6-nitroindole (1) was examined.
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In the reaction with sodium methoxide or sodium cyanide as a nucleophile, 2- and 3-methoxy-6-nitroindoles, and 7-cyano-6-nitroindole were obtained, respectively. A novel methylene homologation at the 3-position was found in the reaction of 1 with sodium methyl sulfide or potassium salt of diethyl malonate to give 3-methylthiomethytyl-6-nitroindole and its 2-methylthio derivative, and diethyl 2-(6-nitroindol-3-yl)methylmalonate, respectively. Possible reaction mechanism is discussed.
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