Browsing by Author "f2e2cce7-7c6a-40c4-b649-707bce4209ce"
Now showing items 1-15 of 15
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3-Mercaptopropionic acid–nitrile imine adducts. An unprecedented cyclization into 1, 3, 4-thiadiazol-2 (3 H)-ones and-2 (3 H)-thiones
(Royal Society of Chemistry, 2005)3-Mercaptopropionic acid–nitrile imine acyclic adducts (6a–c) undergo cyclocondensation with 1,1′-carbonyldiimidazole to afford the respective 1,3,4-thiadiazol-2-(3H)-ones (7a–c). Corresponding 1,3,4-thiadiazol-2(3H)-thiones ... -
A convenient synthesis of some new 1, 3, 4-benzothiadiazepin-5-ones
(Japan Institute of Heterocyclic Chemistry, 2004)CiNii 国立情報学研究所 学術情報ナビゲータ[サイニィ]. メニュー 検索 … -
An alternative synthesis of 2-(N-arylhydrazono)-1-benzothiophen-3-ones
(Royal Society of Chemistry, 2003)In the presence of triethylamine, 2-mercaptobenzoic acid readily adds onto acylhydrazonoyl chlorides (1a–c) (precursors of the reactive nitrile imine 1,3-dipolar species) to afford good yields of the corresponding ... -
Facile Synthesis of Dihydro-1, 2, 4-benzotriazepin-5-ones
(Springer-Verlag, 2006)Direct interaction between model anilines and an 1,3-dipolar nitrile imine, derived from 2-[N′-(1-chloro-2-oxopropylidine)hydrazine]benzoic acid, yielded the respective acyclic amidrazones. The latter adducts underwent ... -
Facile synthesis of model indazolo [2, 1-c][1, 3, 4] benzotriazepine-5, 13-diones
(Japan Institute of Heterocyclic Chemistry, 2008)CiNii 国立情報学研究所 学術情報ナビゲータ[サイニィ]. メニュー 検索 … -
Heterocycles from Nitrile Oxides. Part V; 4-AminoΔ2-1,2,4-Oxadiazolines; Heterocycles
(The Japan Institute of Heterocyclic Chemistry Publication, 1989-08)nitrile, ketone and nitrogen.. Nitrile oxides undergo 1,3-dipolar cycloaddition with alkanone hydrazones to give 4-amino-1,2,4-oxadiazolines. Lead tetracetate oxidation of these compounds brings about smooth heteroring ... -
Heterocycles from Nitrilimines. Part 4. Chiral 4, 5‐Dihydro‐1, 2, 4‐triazin‐6‐ones.
(WILEY‐VCH Verlag, 1992)Heterocycles from Nitrilimines. Part 4. Chiral 4, 5‐Dihydro‐1, 2, 4‐triazin‐6‐ones. -
Metal-assisted Oxidative Cyclization of Arylamidrazones II [1]. Novel Synthesis of 1, 4-Diaryl [1, 2, 4] triazino [6, 5-h] quinolines
(Verlag der Zeitschrift für Naturforschung, 2008)New model 1, 2, 4-triazino [6, 5-h] quinolines 8a-c are prepared by oxidative cyclization of the respective N-(quinolin-8-yl) amidrazone precursors 7a-c using copper (II) chloride. Interestingly, the cyclized products 8a-c ... -
On the synthesis of 3-acetyl-1-aryl-1, 4, 5, 6-tetrahydro-1H-1, 2, 4-triazepin-7-ones by reaction of nitrilimines with 3-aminopropanoic acid
(Springer-Verlag, 2004)Nitrilimines were prepared from N-arylhydrazono chlorides and reacted with β-alanine yielding the corresponding amidrazones, which were treated with 1,1′-carbonyldiimidazole in THF affording the hitherto unknown ... -
On the Synthesis of Some 2-Arylhydrazono-3-oxothieno[2,3-b]pyridines by Reaction of Nitrilimines with 2-Mercaptonicotinic Acid
(Springer-Verlag, 2005)Nitrilimines prepared from N-arylhydrazono chlorides reacted with 2-mercaptonicotinic acid yielding the corresponding addition products, 2-[(2-oxo-1-arylhydrazonopropan-1-yl)mercapto] nicotinic acids, which were treated ... -
Ring Size Influence on the Cyclocondensation Mode of GABA–Nitrile Imine Adducts
(Verlag der Zeitschrift für Naturforschung, 2004)γ-Aminobutyric acid (GABA) adds onto nitrile imine 1, 3-dipolar species (generated in situ from their N-arylhydrazonoyl chloride precursors 1a-c) to deliver the corresponding acyclic amidrazone adducts 10a-c. In the presence ... -
Ring Transformation of Heterocycles: Part 3. A Conversion of 4-Amino-Δ2-1,2,4-oxadiazolines into 2-Arylamino-1,3,4-thiadiazoles and Oxaanalogues
(Japan Institute of Heterocyclic Chemistry, 1994)4-4-amino-Δ2-1,2,4-oxadiazolines (1) are transformed into the corresponding 2-arylamino-1,3,4-oxadiazoles (5), or thiadiazoles (6) via reaction with phenylisocyanate or phenylisothiocyanate. Followed by brief treatment of ... -
Synthesis and Properties of Some Dihydrotetrazolo [5, 1-c][1, 2, 4] triazines
(Japan Institute of Heterocyclic Chemistry, 2006)CiNii 国立情報学研究所 学術情報ナビゲータ[サイニィ]. メニュー 検索 … -
Synthesis and properties of some new 5-fluoro-6-(heterocyclyl) benzofuroxans
(Asian Journal of Chemistry, 1999)A series of 5-fluoro-6-(heterocyclyl) benzofuroxans (3b-e) have been prepared by hypochlorite oxidative cyclization of the respective 4-fluoro 5-(N-heterocyclyl)-2-nitroanilines (2b-e). The heterocyclyls include piprazine, ... -
Synthesis of Some Ethyl 3-(Aryldiazenyl)-7-oxo-dihydropyrido [2, 3-f] quinoxaline-8-carboxylates
(Verlag der Zeitschrift für Naturforschung, 2007)Ethyl 7, 8-diamino-1-cyclopropyl-6-fluoro-4-oxo-1, 4-dihydroquinoline-3-carboxylate (6) and its free acid 7 are prepared by chemical reduction of the respective 7-azido-8-nitroquinoline 5. Consecutive nucleophilic addition ...