Results 131 to 140 of about 9,016 (186)
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Quinazoline derivatives with antitubercular activity

Il Farmaco, 2000
4-Quinazolinol was prepared by the reaction of anthranilic acid and formamide. The hydroxy group was converted into the thiol function by treatment with phosphorus(V)sulfide, and the subsequent alkylation of the thiol group was carried out with alkylhalides under the conditions of phase-transfer catalysis.
J, Kunes   +5 more
openaire   +2 more sources

Dermatitis from quinazoline oxide

Contact Dermatitis, 1986
Dermatitis from 2‐chloromethyl‐4‐phenyl‐6‐chloroquinazoline‐3‐oxide, an intermediate product in the preparation of chlorodiazepoxide, is described in 29 workers at a pharmaceutical plant. All were patch test positive to quinazoline oxide (1%) and six to 0.05%. In most patients, the face was earlier and more severely involved than the hands.
P, Rebandel, E, Rudzki
openaire   +2 more sources

Pyrimido[4,5‐f]quinazolines.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
N. N. Tonkikh   +2 more
openaire   +1 more source

Biology of quinoline and quinazoline alkaloids

2022
Quinoline and quinazoline alkaloids, two important classes of N-based heterocyclic compounds, have attracted scientific and popular interest worldwide since the 19th century. More than 600 compounds have been isolated from nature to date. To build on our two prior reviews, we reexamined the promising molecules described in previous reports and provided
Xiao-Fei, Shang   +5 more
openaire   +2 more sources

Quinazoline analogues of folic acid

Journal of the Chemical Society C: Organic, 1970
Analogues of folic acid having the pteridine ring replaced by quinazoline have been prepared by reductive condensation of appropriately substituted quinazoline-6-carbaldehydes and -carbonitriles with diesters of N-(p-aminobenzoyl) amino-acids, followed by hydrolysis.
J, Davoll, A M, Johnson
openaire   +2 more sources

Quinazolines. Part VIII. Electronic effects in 2-substituted quinazolines

Journal of the Chemical Society C: Organic, 1966
In a study of the cations of twenty 2-substituted quinazolines, it was found that covalent hydration of the 3,4-double bond decreased according to the electronic effect of the 2-substituent; viz, +l > +M > –l. This is explained by the effect of the substituent on the polarity of the C-4, N-3 double bond. The effect of the acyl group on the rate of ring
W. L. F. Armarego, J. I. C. Smith
openaire   +1 more source

Quinazolines as Inhibitors of Xanthe Oxidase

Journal of Pharmaceutical Sciences, 1974
A series of 23 quinazolines and 5,6,7,8-tetrahydroquinazolines was evaluated for inhibition of bovine milk xanthine oxidase. The synthesis of four of these compounds has not been reported previously. Several 2-amino-4-hydroxyquinazolines, as well as 2-amino-4-mercaptoquinazoline, were effective inhibitors of this enzyme.
D G, Priest   +3 more
openaire   +2 more sources

Polarography of Quinazoline

Nature, 1964
THE polarographic behaviour of quinazoline displays special features which are not shown by the related compounds quinoxaline, phthalazine and 1,5-naphthyridine.
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Quinazolines. Part X. The fragmentation of quinazolines under electron impact

Journal of the Chemical Society B: Physical Organic, 1967
Quinazoline, under electron impact, fragments by the consecutive loss of two molecules of HCN to give a benzyne radical ion. Fragmentation of substituted quinazolines also occurs by this pathway as well as by others normally associated with the breakdown of the substituent.
T. J. Batterham   +2 more
openaire   +1 more source

Synthesis of Unsymmetrical Dialkoxy Quinazolines.

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Matthieu Desroses   +3 more
openaire   +1 more source

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