- L-4-Chlorotryptophan from Immature Seeds of Pisum sativum and Reassignment of the Absolute Stereochemistry of N-Malonyl-4-chlorotryptophan
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Free 4-chlorotryptophan (4-Cl-Trp) was isolated from immature seeds of P. sativum, identified, and its stereochemistry determined to be L-form.Reinvestigation of the N-malonyl-4-Cl-Trp isolated from the same seeds showed that the stereochemistry of the 4-Cl-Trp residue is L-form.
- Sakagami, Youji,Manabe, Kan,Aitani, Takayuki,Thiruvikraman, S. V.,Marumo, Shingo
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- Ruthenium Catalysed N-Heterocyclisation: Indoles from 2-Aminophenethyl Alcohols
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Dichlorotris(triphenylphosphine)ruthenium is highly active as a catalyst for the N-heterocyclisation of 2-aminophenethyl alcohols (2a-d) into indole derivatives in toluene under reflux, and the reactions proceed with spontaneous hydrogen evolution.
- Tsuji, Yasushi,Huh, Keun-Tae,Yokoyama, Yasuharu,Watanabe, Yoshihisa
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- Dehydrogenative and Redox-Neutral N-Heterocyclization of Aminoalcohols Catalyzed by Manganese Pincer Complexes
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A new manganese catalyzed heterocyclization of aminoalcohols has been accomplished. A wide range of heterocycles were synthesized, including 1,2,3,4-tetrahydroquinolines, dihydroquinolinones, and 2,3,4,5-tetrahydro-1H-benzo[b]azepines. The reaction is performed under mild reaction conditions using air and moisture stable manganese catalysts. The desired heterocycles were obtained in good to excellent yields.
- Brzozowska, Aleksandra,Rueping, Magnus,Sklyaruk, Jan,Zubar, Viktoriia
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supporting information
(2022/03/17)
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- Tricyclic compound or salts thereof, method for producing the same and antimicrobial agent containing the same
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A tricyclic compound represented by the general formula (1) and salts thereof. STR1 A method for producing the tricyclic compound and salts thereof, and an antimicrobial agent containing the tricyclic compound and salts thereof as an active ingredient are
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- Ruthenium-Catalyzed Dehydrogenative N-Heterocyclization: Indoles from 2-Aminophenethyl Alcohols and 2-Nitrophenethyl Alcohols
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Indole derivatives 3 were readily obtained from 2-aminophenethyl alcohols 1 in the presence of 2 mol percent (based on 1) of RuCl2(PPh3)3 under reflux in toluene.Indole (3a) was afforded from 2-aminophenethyl alcohol (1a) quantitatively.Other indoles (3) were also obtained in 73-99percent isolated yields from the corresponding 1, which were easily prepared by condensation between the corresponding 2-nitrotoluenes and aldehydes followed by reduction.During the reaction, a stoichiometric amount of hydrogen was spontaneously evolved into the gas phase.With a heterogeneous and homogeneous binary catalyst system, indoles were afforded in one pot from 2-nitrophenethyl alcohols 2 under a hydrogen atmosphere.
- Tsuji, Yasushi,Kotachi, Shinji,Huh, Keun-Tae,Watanabe, Yoshihisa
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p. 580 - 584
(2007/10/02)
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