title: Synthesis and antifungal activity of novel pyrano[2',3':4,5]thiazolo[2,3-b]quinazolines, pyrido[2',3':4,5]thiazolo[2,3-b]quinazolines and pyrazolo[2',3':4,5]thiazolo[2,3-b]quinazolines.
abstract: The starting materials thiazolo[2,3-b]quinazolines (5a,b) were obtained in one pot synthesis by treating octahydroquinazoline (2) with chloroacetic acid and aromatic aldehydes. Thiazoloquinazoline (5) was reacted with CH2(CN)2/piperidine and CH2(CN)2/NaOH (CH3OH), to furnish pyrano[2',3':4,5]thiazolo[2,3-b]quinazolines (6a,b) and pyrido[2',3':4,5]thiazolo[2,3-b]quinazoline (7), respectively. Refluxing of 5a with NH2CSNH2/KOH and hydrazines in ethanol furnished the corresponding, [1,3]thiazino[4'5':4,5]thiazolo[2,3-b]quinazoline (10) and pyrazolo[3',4':4,5]thiazolo[2,3-b]quinazolines (11a,b), respectively. Antifungal activity was shown for some of the synthesized compounds.
authors.affiliation: Department of Chemistry, Faculty of Science (Girl's), Al-Azhar University, Cairo, Egypt.
authors.forename: S M
authors.initials: SM
authors.lastname: Abdel-Gawad
authors.forename: M S
authors.initials: MS
authors.lastname: El-Gaby
authors.forename: M M
authors.initials: MM
authors.lastname: Ghorab
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry / Q000494:pharmacology*; D001231:Aspergillus flavus; D001235:Aspergillus ochraceus; D002176:Candida albicans; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010408:Penicillium chrysogenum; D011714:Pyrans / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D011799:Quinazolines / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D013844:Thiazoles / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000935:Antifungal Agents; D011714:Pyrans; D011720:Pyrazoles; D011725:Pyridines; D011799:Quinazolines; D013844:Thiazoles; C031280:pyrazole; C023666:pyridine