- Asymmetric Dearomatizing Fluoroamidation of Indole Derivatives with Dianionic Phase-Transfer Catalyst
-
Asymmetric dearomatizing fluorocyclization of indole derivatives was investigated using a dicarboxylate phase-transfer catalyst. This reaction proceeds under mild reaction conditions to provide fluoropyrroloindoline derivatives in a highly enantioselective manner. Various substitution patterns on the indole ring are well tolerated. To facilitate the reaction and ensure reproducibility, the addition of water is essential, and its possible role is discussed.
- Egami, Hiromichi,Hotta, Ryo,Otsubo, Minami,Rouno, Taiki,Niwa, Tomoki,Yamashita, Kenji,Hamashima, Yoshitaka
-
supporting information
p. 5656 - 5660
(2020/07/14)
-
- Substituted indoles as alpha-1 agonists
-
This invention relates to compounds which are alpha-1 receptor agonists, preferably alpha-1A/L receptor agonists, and which are represented by Formula I: wherein m, A, X, Y, R1, R2, R3, R4 and R5 are as defined in the specification; or individual isomers, racemic or non-racemic mixtures of isomers, or pharmaceutically acceptable salts or solvates thereof. The invention further relates to pharmaceutical compositions containing such compounds, methods for their use as therapeutic agents, and methods of preparation thereof.
- -
-
-
- Synthesis and biological activities of 4-chloroindole-3-acetic acid and its esters.
-
4-Chloroindole-3-acetic acid (4-Cl-IAA) and its esters were synthesized from 2-chloro-6-nitrotoluene as the starting material. The biological activities of 4-CI-IAA and its esters were determined by four bioassays. Except for the tert-butyl ester, 4-Cl-IAA and its esters had stronger elongation activity toward Avena coleoptiles than had indole-3-acetic acid. The biological activities of the methyl, ethyl and allyl esters were as strong as the activity of the free acid. All the esters, except for the tert-butyl, inhibited Chinese cabbage hypocotyl growth more than the free acid did, and all the esters induced severe swelling and formation of numerous lateral roots in black gram seedlings even at a low concentration. Furthermore, adventitious root formation was strongly promoted in Serissa japonica cuttings by all the esters. The root formation-promoting activities of the ethyl and allyl esters were about three times the value for indole-3-butyric acid which is used to promote and accelerate root formation in plant cuttings.
- Katayama
-
p. 808 - 815
(2007/10/03)
-
- Tryptamine analogues, their synthesis and their use as 5-HT1 -like or 5-HT2 receptor agonists
-
The present invention relates to known and novel tryptamine analogues, processes and intermediates useful in their preparation, pharmaceutical compositions containing them and their use in therapy, in particular for the treatment and/or prophylaxis of dis
- -
-
-
- Methodology for the efficient synthesis of 3,4-differentially substituted indoles. Fluoride ion-induced elimination-addition reaction of 1-triisopropylsilylgramine methiodides
-
1-Triisopropylsilylgramine methiodide reacted smoothly with a variety of nucleophiles in the presence of tetrabutylammonium fluoride to give 3-substituted indoles. The 3,4-disubstituted indoles were efficiently synthesized by sequential use of 4-selective lithiation of 1-triisopropylsilylgramine and this new substitution reaction.
- Iwao, Masatomo,Motoi, Osamu
-
p. 5929 - 5932
(2007/10/02)
-