83725-79-5Relevant academic research and scientific papers
Substituted phenyl derivatives, their preparation and use
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, (2008/06/13)
The present invention discloses compounds having the formula wherein the substituents are defined in the application. The compounds are useful as chloride channel blockers.
Substituted phenyl derivatives, their preparation and use
-
, (2008/06/13)
The present invention discloses compounds having the formula wherein the substituents are defined in the application. The compounds are useful as chloride channel blockers.
Substituted phenyl derivatives, their preparation and use
-
, (2008/06/13)
A compound having the formula (I) or a pharmaceutically acceptable salt thereof where the variables are defined in the specification are useful in the treatment of sickle-cell anemia.
Some 1-Aroyl-4,4-dialkylsemicarbazides and Their Cyclization to Afford 5-Aryl-1,3,4-oxadiazol-2(3H)-ones
Davidson, John S.
, p. 1027 - 1030 (2007/10/02)
Some 1-aroyl-4,4-dialkylsemicarbazides have been prepared by reacting aroyl-hydrazides with dimethyl- or diethyl-carbamoyl chloride.In boiling DMF they lose dimethylamine or diethylamine to give 5-aryl-1,3,4-oxadiazol-2(3H)-ones. - Keywords: 1-Aroyl-4,4-d
1,3,4-Oxadiazolin-2-ones from Carbo-t-butoxyhydrazones
Baumgarten, Henry E.,Hwang, Deng-Ruey,Rao, T. N.
, p. 945 - 949 (2007/10/02)
5-Substituted-1,3,4-oxadiazolin-2-ones 2 were synthesized by the oxidation of carbo-t-butoxyhydrazones 1 of aromatic aldehydes with lead tetraacetate or, preferably, iodosobenzene diacetate.In some instances 5-acetoxy-1,3,4-oxadiazoles 3 were obtained along with 2.The oxidation of carboethoxyhydrazones 4 gave 2-ethoxy-1,3,4-oxadiazoles 5.
The Preparation of 5-(2-Aminophenyl)-1,3,4-oxadiazole-2(3H)-one and Its Rearrangement to 3-Amino-2,4(1H,3H)-quinazolinedione
Davidson, John S.
, p. 565 - 572 (2007/10/02)
When anthranilic acid hydrazide is reacted with 1,1'-carbonyldiimidazole in THF 5-(2-aminophenyl)-1,3,4-oxadiazole-2(3H)-one (4) is formed.It can also be prepared from 1-o-aminobenzoyl-4,4-dimethylsemicarbazide which eliminates methylamine when boiled with DMF.On heating the 5-(2-aminophenyl)-1,3,4-oxadiazole above its melting point it rearranges to 3-amino-2,4(1H,3H)-quinazolinedione (5). - Keywords: 3,4-Dihydro-1H-1,3,4-benzotriazepine-2,5-dione; Oxadiazoles
Synthesis of Substituted N-(2,4-Dioxo-1,2,3,4-tetrahydroquinazolinyl)benzamides and N-(2-Thiono-4-oxo-1,2,3,4-tetrahydroquinazolinyl)benzamides
Chau, Nguyen,Saegusa, Yasuo,Iwakura, Yoshio
, p. 541 - 544 (2007/10/02)
Substuted N-(2,3-dioxo-1,2,3,4-tetrahydroquinazolinyl)benzamides (3a-g) and substituted N-(2-thiono-4-oxo-1,2,3,4-tetrahydroquinazolinyl)benzamides (4a-g) were synthetized in one step from the reaction of methyl anthranilate with 2-aryl-1,3,4-oxadiazolin-5-ones (1a-g) and 2-aryl-1,3,4-oxadiazoline-5-thiones (2a-g), respectively, in m-cresol at 150-160 deg C.Alternative routes leading to the formation of 3a and 4a are also reported.
