Reactions of isocyanates with methyl<i>N</i>-(cyanothioformyl)anthranilate
作者:L. M. Deck、E. P. Papadopoulos、K. A. Smith
DOI:10.1002/jhet.5570400522
日期:2003.9
The triethylamine-catalyzed reactions of methyl N-(cyanothioformyl)anthranilate (1) with isocyanates result in cyclization involving the cyano group to form methyl 2-(4-imino-2-oxo-3-substituted-5-thioxoimi-dazolidin-1-yl)benzoates (4). Ring closure at the ester carbonyl to form 3-aryl-3,4-dihydro-4-oxoquinazo-line-2-carbonitriles (8) is observed when the S-methyl derivative of 1 is allowed to react
Specific puromycin-sensitive aminopeptidase (PSA) inhibitors with a 3-(halogenated phenyl)-2,4(1H,3H)-quinazolinedione skeleton were prepared and their structure-activity relationships were investigated. The nature (F, Cl or Br), number and position(s) of the halogen atom(s) introduced into the 3-phenyl group were concluded to be critical determinants of the inhibitory activity.
3-aryl(alkyl)quinazoline-2,4(1H,3H)-diones and their alkyl derivatives
作者:A. S. Shestakov、O. E. Sidorenko、I. S. Bushmarinov、Kh. S. Shikhaliev、M. Yu. Antipin
DOI:10.1134/s1070428009110190
日期:2009.11
Two-stage reaction of methyl anthranilate with aryl(alkyl) isocyanates in keeping with the quantum-chemical calculations and XRD analysis resulted in 3-aryl(alkyl) quinazoline-2,4(1H,3H)-diones that by treatment with alkyl halides, phenacyl bromides, esters and amides of chloroacetic acid were converted into the corresponding 1-alkyl derivatives.
PAPADOPOULOS, E. P.;TORRES, C. D., J. HETEROCYCL. CHEM., 1982, 19, N 2, 269-272