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3- quinazolone

The quinazoline ring also gives some anomalous quatemization reactions, which presumably reflect the influence of the unusual 3,4-bond. 3-Methyl-4-quinazolone (71 Y = O) and, more... [Pg.31]

Dichroa cyanitis Miq. D. febrifuga Lour. D. latifolia Miq. Chang Shan (Chinese quinine, fever flower) (root) Dichroines, dichroidine, 4-quinazolone, dichrins.33 This herb is toxic. Antiamebial, antipyretic, for use against chicken malaria. [Pg.70]

Synthesis from quinazoline precursors was achieved by carrying out a Vilsmeier-Haack reaction on 3-amino-2-methyl-4-quinazolone (96) to give the intermediate diformyl derivative 97 that cyclized to 3-formylpyra-zolo[5,l-b]-quinazolin-9-one (98) [73IJC532 84IJC(B)161]. [Pg.21]

It is interesting to note that 3,5-diphenyl-l,2,4-oxadiazole (155) undergoes a slow ring cleavage on irradiation in ether, giving benzoyl-benzamidine (156) and 2-phenyl-4-quinazolone (157) as major products.140 Ring cleavage also occurs in 1,2,5-oxadiazoles, 1,2,5-thia-diazoles, and 25-1,2,3-triazoles.141... [Pg.40]

SYNS MELSEDIN METHYLQULN AZOLONE HYDROCHLORIDE 2-METH X-3-TOLYLCHIN-AZOLON-4 HYDROCHLORIDE (GERMAN) 2-METHYL-3-o-TOL X-4(3H)-QUINAZOUNONE HYDROCHLORIDE 2-METH X-3-(o-TOL X)-4-QUINAZOLONE HYDROCHLORIDE MTQ HYDROCHLORIDE OPTIMIL PAREST SOMNAFAC TUAZOLE... [Pg.886]

A mixture of 4-quinazolone and aq. 85 %-hydrazine hydrate refluxed ca. 30 min., whereby the first crop of the reaction product is separated after ca. 10 min. —3-amino-4-quinazolone. Y 75%.—The order of... [Pg.92]

Etaqualone, 3-(2-Ethylphenyl)-2-methyl-4(3H)-quinazolinone 2-methyl -3 -(o-ethyIpheny])-4, -quinazolone,... [Pg.586]

Febrifugine, 3-[3-<3-Hydroxy-2-piperidinyt)-2-oxopropyl]-4<3H)-quinazolinone 3-[3-(3-hydroxy-2-piperid- l /cu et >ttyl]-4 3Hi.quina-,ohnone 3-[0-keto-y-(3-hydroxy-2-piperidy])propyl]-4-quinazolone (3-dichrome C,(H,-... [Pg.619]

The production of 2-(2-hydroxyphenylamino)-4-quinazolone by condensation of anhydride 1 with N-(2-hydroxyphenyl)thiourea was reported in [70],... [Pg.18]

The 4-quinazolone derivative 123 was synthesized with a yield of 99% by heating the anhydride with the amine 122 and ethyl orthoformate [73],... [Pg.19]

The condensation of the anhydride (1) with the hydrazides of arenecarboxylic acids 127 in the presence of p-toluenesulfonic acid gave the 2-aryl-3-amino-4-quinazolones 128 [77],... [Pg.20]

The amino amides 195 were obtained from isatoic or 6-iodoisatoic anhydrides and the esters of amino acids. They were converted by the action of aromatic aldehydes or acetone into derivatives of dihydro-4-quinazolone 196 (ethanol, piperidine, boiling for 1 h, or cone, hydrochloric acid, boiling for 6 h [117] toluene, toluene sulfonic acid, boiling for 0.5 h, [118]). [Pg.31]

See other pages where 3- quinazolone is mentioned: [Pg.186]    [Pg.617]    [Pg.29]    [Pg.30]    [Pg.288]    [Pg.380]    [Pg.328]    [Pg.404]    [Pg.1782]    [Pg.67]    [Pg.1028]    [Pg.286]    [Pg.85]    [Pg.367]    [Pg.67]    [Pg.92]    [Pg.92]    [Pg.365]    [Pg.372]    [Pg.377]    [Pg.391]    [Pg.66]    [Pg.67]    [Pg.67]    [Pg.214]    [Pg.224]    [Pg.257]    [Pg.20]    [Pg.105]    [Pg.106]   
See also in sourсe #XX -- [ Pg.367 ]

See also in sourсe #XX -- [ Pg.3 , Pg.105 , Pg.112 ]

See also in sourсe #XX -- [ Pg.105 , Pg.112 ]

See also in sourсe #XX -- [ Pg.174 , Pg.174 , Pg.175 ]



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2 -Quinazolones, 3,4-dihydro

3- quinazolone reactions

3-Methyl-4-quinazolone

4 -Quinazolones 4-hydroxy

4-Quinazolone ring opening

4-Quinazolone, 3-alkyl

4-Quinazolone-2-carboxylic

4-Quinazolone-2-carboxylic acid esters

4-Quinazolones 3-amino— from

4-Quinazolones esters

NIEMENTOWSKI Quinazolone synthesis

O-Cyanoisocyanates 2-quinazolones, 4-halogeno

Quinazoline and Quinazolone Alkaloids

Quinazolines 4-quinazolones

Quinazolines and Quinazolones

Quinazolone formation

Quinazolone formation anthranilic acid

Quinazolones

Quinazolones

Quinazolones structure

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