title: An eco-friendly synthesis and antimicrobial activities of dihydro-2H-benzo- and naphtho-1,3-oxazine derivatives.
abstract: A series of 3,4-dihydro-2H-benzo[e]-, 2,3-dihydro-1H-naphtho[1,2-e]-, 3,4-dihydro-2H-naphtho[2,1-e][1,3]oxazine and 1,2-bis(3,4-dihydrobenzo[e][1,3]oxazin-3(4H)-yl)ethane derivatives was obtained through an eco-friendly Mannich type condensation-cyclization reaction of phenols or naphthols with formaldehyde and primary amines in water at ambient temperature. Preliminary in vitro antimicrobial activity of the synthesized compounds was assessed against six pathogenic fungi, two Gram-negative and two Gram-positive bacteria. Some of the screened compounds have shown significant in vitro antimicrobial effect. Cytotoxic activities of the lead compounds (2m, 2n, 3c and 3d) against mouse fibroblast cell line (L929) were determined by MTT method. The assay results revealed that these molecules offered remarkable viability (>90%) of L929 cells at concentration of 25 microg/mL.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi 110 007, India.
authors.forename: Bijoy P
authors.initials: BP
authors.lastname: Mathew
authors.forename: Awanit
authors.initials: A
authors.lastname: Kumar
authors.forename: Satyasheel
authors.initials: S
authors.lastname: Sharma
authors.forename: P K
authors.initials: PK
authors.lastname: Shukla
authors.forename: Mahendra
authors.initials: M
authors.lastname: Nath
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D002460:Cell Line; D004463:Ecology; D005658:Fungi / Q000187:drug effects; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008826:Microbial Sensitivity Tests; D010078:Oxazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D021241:Spectrometry, Mass, Electrospray Ionization; D013329:Structure-Activity Relationship
chemical_list: D000890:Anti-Infective Agents; D010078:Oxazines