Synthesis and antimicrobial activities of novel naphtho[2,1-b]pyran, pyrano[2,3-d]pyrimidine and pyrano[3,2-e][1,2,4]triazolo[2,3-c]-pyrimidine derivatives

4,4,6,8-Tetramethyl-2-tosylpyrrolo[3,4-c]pyrano[6,5-b]pyrimidine-7,9-dione

“…For biological activities of pyranopyrimidine derivatives, see: Abdel Fattah et al (2004); Bedair et al (2000Bedair et al ( , 2001; Eid et al (2004); Shamroukh et al (2007). For ring puckering parameters, see: Cremer & Pople (1975).…”

ZrOCl2/nano TiO2 as an Efficient Catalyst for the One Pot Synthesis of Naphthopyranopyrimidines Under Solvent-free Conditions

“…Naphthopyranopyrimidines are fused heterocyclic compounds that display antioxidant 5 and antimicrobial 6 activities. Therefore, the development of simple methods for their synthesis is an important challenge.…”

Heteroaromatization with 4-phenyldiazenyl-1-naphthol. Part II: Synthesis of some new benzochromens, benzochromenopyrimidines, benzochromenotriazolopyrimidines, benzochromenopyrimidotriazepine and antimicrobial activities

“…Moreover azo compounds are known for their antineoplastics [13], antidiabetics [14], antiseptics [15], antibacterial [16] and antitumor [17]. Benzochromene represent a class of heterocyclic compounds endowed with potent antimicrobial agents [18][19][20][21][22][23], antileishmanial [24,25], anticancer [26,27], antiproliferative [28], antioxidant [29,30], hypertensive [31], antitumor [32][33][34][35] effects and activities, as well as for the treatment of Alzheimer's disease [36], schizophrenia disorders [37], and fused chromene ring systems also displayed blood platelet antiaggregating [38], antihistaminic [39], analgesic [40][41][42], hypolipidemic [43], DNA breaking and mutagenicity activities [44].…”