title: Design and synthesis of novel tricycles based on 4H-benzo[1,4]thiazin-3-one and 1,1-dioxo-1,4-dihydro-2H-1lambda6-benzo[1,4]thiazin-3-one.
abstract: This paper reports our recent efforts to develop novel tricycles based on 4H-benzo[1,4]thiazin-3-one ( 2) and 1,1-dioxo-1,4-dihydro-2H-1lambda(6)-benzo[1,4]thiazin-3-one (3) using 1,5-difluoro-2,4-dinitrobenzene (1). All of these tricycles integrate two privileged structures into one skeleton, including 3,8-dihydro-5-thia-1,3,8-triaza-cyclopenta[b]naphthalene-7-one (4, 10, 12), 5,5-dioxo-3,5,6,8-tetrahydro-5lambda(6)-thia-1,3,8-triaza-cyclopenta[b]naphthalene-7-one (5, 11), 3,8-dihydro-5-thia-1,2,3,8-tetraaza-cyclopenta[b]naphthalene-7-one (6), 5,5-dioxo-3,5,6,8-tetrahydro-5lambda(6)-thia-1,2,3,8-tetraaza-cyclopenta[b]naphthalene-7-one (7), 3,8-dihydro-1H-5-thia-1,3,8-triaza-cyclopenta[b]naphthalene-2,7-dione (8), and 5,5-dioxo-3,5,6,8-tetrahydro-1H-5lambda(6)-thia-1,3,8-triaza-cyclopenta[b]naphthalene-2,7-dione (9). A typical library of scaffold 5 was synthesized in a parallel solution-phase manner and analyzed by HPLC-UV-MS or HPLC-UV-ELSD method.
authors.affiliation: Institute of Materia Medica, Chinese Acedemy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Zhanguo
authors.initials: Z
authors.lastname: Wang
authors.forename: Yuyan
authors.initials: Y
authors.lastname: Chen
authors.forename: Yunyun
authors.initials: Y
authors.lastname: Yuan
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
mesh_terms: D048588:Benzoxazines / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D020650:Combinatorial Chemistry Techniques; D013058:Mass Spectrometry; D008956:Models, Chemical; D011083:Polycyclic Compounds / Q000138:chemical synthesis*; D013056:Spectrophotometry, Ultraviolet; D014227:Triazines / Q000737:chemistry*
chemical_list: D048588:Benzoxazines; D011083:Polycyclic Compounds; D014227:Triazines