Chemoselective Reaction of Benzoylisothiocyanates with Hydroxyl Group of Salicylamide: a New and Convenient Entry Into 2-Aryl-4<i>H</i>-benzo[e][1,3]oxazin-4-ones
作者:Tarjeet Singh、Girija S. Singh、Ram Lakhan
DOI:10.1080/10426507.2012.755974
日期:2013.10.1
Abstract The reactions of benzoylisothiocyanates with salicylamide in pyridine-xylene solution occurs chemoselectively at the hydroxyl group of the salicylamide to afford the corresponding O-benzoyl derivatives. The latter products, on prolonged heating in pyridine-xylene solution, undergo cyclodehydration to give 2-aryl-4H-benzo[e][1,3]oxazin-4-ones in good yields. These compounds could also be synthesized
Synthesis of Some 2-Aryl-1,2,4-triazolo[1,5-c][1,3]benzoxazin-5-ones as Tools To Define the Essential Pharmacophoric Descriptors of a Benzodiazepine Receptor Ligand
The synthesis and benzodiazepine receptor (BZR) affinity of some 1,2,4-triazolo[1,5-c][1,3]benzoxazin-5-ones, 2-22, are reported. Compounds 2-22 are devoid of the proton donor group, which according to a BZR schematic model was one of the pharmacophoric descriptors for receptor-ligand interaction. The binding data show that 2-(2-fluorophenyl)-9-chloro-1,2,4-triazolo[1,5-c][1,3]benzoxazin-5-one (12) and some other compounds display nanomolar BZR affinity, indicating that the hydrogen donor group is not essential for the anchoring of 6,6,5-tricyclic systems to the BZR but only affects the potency of a ligand.
Synthesen von Heterocyclen, 119. Mitt.: �ber Reaktionen des Salicyls�urechlorids mit aromatischen Thioamiden
作者:G. Kollenz、Th. Kappe、E. Ziegler
DOI:10.1007/bf01154329
日期:——
Synthesis of 4-oxo-1,3-benz- and naphthoxazinium salts from o-hydroxyarylamides
作者:O. Yu. Ryabukhina、Yu. I. Ryabukhin、B. S. Luk'yanov、G. N. Dorofeenko
DOI:10.1007/bf00514728
日期:1979.12
Lakhan, Ram; Singh, R. L., Journal fur praktische Chemie (Leipzig 1954), 1988, vol. 330, # 2, p. 299 - 304