Convenient Synthesis of 4-Trifluoromethyl-Substituted Imidazole Derivatives
スポンサーリンク
概要
- 論文の詳細を見る
Mesoionic 4-trifluoroacetyl-1, 3-oxazolium-5-olates(1), obtained from the reaction of N-acyl-N-alkylglycines(2)with trifluoroacetic anhydride, react with ammonia to give 4-trifluoromethyl-3, 4-dihydromidazoles(3)in high yields. Dehydration of 3 gives 4-trifluoromethylimidazoles(4)in high yields. The novel ring transformation of 1 into 3 occurs via a regioselective attack of ammonia on the C-2 position of the ring.
- 公益社団法人日本薬学会の論文
- 2001-04-01
著者
-
Saito Setsuo
Faculty of Pharmaceutical Science,Josai University
-
Kurihara T
Josai Univ. Saitama Jpn
-
Kurihara Teruo
Faculty Of Science Josai University
-
KAWASE Masami
Faculty of Pharmaceutical Sciences, Josai University
-
Kawase M
Faculty Of Pharmaceutical Sciences Josai University
-
Kawase Masami
Faculty Of Pharmaceutical Sciences Josai University
-
Saito S
Department Of Pharmaceutical Molecular Biology Graduate School Of Pharmaceutical Sciences Tohoku Uni
関連論文
- Enhanced antibacterial effect of erythromycin in the presenceof 3,5-dibenzoyl-1,4-dihydropyridines
- Antimicrobial Activity of New Coumarin Derivatives
- Relationship between Radical Intensity and BiologicalActivity of Cacao Husk Extracts
- Trifluoromethyl Ketone-Based Inhibitors of Apoptosis in Cerebellar Granule Neurons
- Effects of Trifluoromethyl Ketones on the Motility of Proteus vulgaris(Medicinal Chemistry)
- Synthesis of Trifluoromethyl-Substituted Pyrazoles and 1,2,4-Triazines by Ring Transformation of Mesoionic 4-Trifluoroacetyl-1,3-oxazolium-5-olates with Phenylhydrazine
- Preparations of Anthraquinone and Naphthoquinone Derivatives and Their Cytotoxic Effects
- Inhibitory Effect of Mao-Bushi-Saishin-to on Prostaglandin E_2 Synthesis in C6 Rat Glioma Cells(Pharmacology)
- Ephedrae herba in Mao-Bushi-Saishin-To Inhibits IgE-Mediated Histamine Release and Increases cAMP Content in RBL-2H3 Cells
- Preparation of 1,8-Di-O-alkylaloe-emodins and 15-Amino-, 15-Thiocyano-, and 15-Selenocyanochrysophanol Derivatives from Aloe-Emodin and Studying Their Cytotoxic Effects
- Reactions of 26-Iodopseudodiosgenin and 26-Iodopseudodiosgenone with Various Nucleophiles and Pharmacological Activities of the Products
- Brominations of Steroidal Hormone Having α, β-Unsaturated Ketone, 17-O-Acetyltestosterone, in the Presence of Silver Triflate
- Site-Selective Trifluoroacetylation of Dimethylamino-Substituted Pyridines and Its Use as a Building Block for Trifluoromethyl-Containing Heterocycles
- Ephedrae herba (Mao) decreased histamine content in RBL-2H3 cells
- Investigation on Sub-20 fs Fiber-soliton Compression Performance of Dispersion-Flattened Fibers
- Sub-100fs Higher Order Soliton Compression in Dispersion-Flattened Fibers(Special Issue on Ultrafast Optical Signal Processing and Its Application)
- Convenient Synthesis of 4-Trifluoromethyl-Substituted Imidazole Derivatives
- Convenient Synthesis of α-Trifluoromethylated Acyloins from α-Hydroxy or α-Amino Acids
- Hydrolytic Cleavage of Pyroglutamyl-Peptide Bond. II. Effects of Amino Acid Residue Neighboring the pGlu Moiety
- HIGHLY SELECTIVE CLEAVAGE OF PYROGLUTAMYL-PEPTIDE BOND IN CONCENTRATED HYDROCHLORIC ACID
- Decomposition of pyroglutamyl-Peptides in Dilute Acid
- Electronic Structures and Oxidation Potentials of Some Azulene Derivatives
- A General Method for the Preparation of 5-Trifluoromethylated Oxazoles from α-Amino Acids
- An Efficient Synthesis of N-tert-Butoxycarbonyl-O-cyclohexyl-L-tyrosine
- An Improved Synthesis of N-Boc-O-Cyclohexyl-Tyrosine
- Reaction of Guaiazulene with Bromine in Hexane and in Aqueous Tetrahydrofuran^1
- A Highly Convenient, One-Pot Synthesis of 3-Bromo-1,5-and-1,7-Azulenequinones by Polybromination of Azulene^1
- The Dakin-West Reaction of N-Alkoxycarbonyl-N-alkyl-α-amino Acids Employing Trifluoroacetic Anhydride
- Autoxidation of Intermediary Mesoionic 1,3-Oxazolium-5-olates Generated from Cyclic N-Acyl α-Amino Acids
- Semisynthesis of Isetexane Diterpenoid Analogues and Their Cytotoxic Activity
- Syntheses and Properties of Tetraazaazulenocoronands and Octaazaazulenocryptand
- Convenient Synthesis of 5-Trifluoroacetylated Imidazoles by Ring Transformation of Mesoionic 1,3-Oxazolium-5-olates
- Preparation of mesoverdohemochrome IX.ALPHA. dimethyl ester and Moessbauer spectra of related porphyrins.
- Chemical studies on products obtained from verdohemochrome IX.ALPHA. dimethyl ester by treatment with ammonia under air.