title: New simple synthesis of ring-fused 4-alkyl-4H-3,1-benzothiazine-2-thiones: Direct formation from carbon disulfide and (E)-3-(2-aminoaryl)acrylates or (E)-3-(2-aminoaryl)acrylonitriles.
abstract: A new simple and efficient method to construct ring-fused 4-alkyl-4H-3,1-benzothiazine-2-thione derivatives has been developed from carbon disulfide and (E)-3-(2-aminoaryl)acrylates or (E)-3-(2-aminoaryl)acrylonitriles under mild conditions, without the need for a metal catalyst. The newly developed method tolerates a wide range of substrates in moderate to excellent yields. Moreover, this method is advantageous over previous ones for the easy synthesis of reactants.
authors.affiliation: Key Laboratory of Functional Small Organic Molecules, Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China.
authors.forename: Qiuping
authors.initials: Q
authors.lastname: Ding
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Lin
authors.forename: Guangni
authors.initials: G
authors.lastname: Ding
authors.forename: Fumin
authors.initials: F
authors.lastname: Liao
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Sang
authors.forename: Yi-Yuan
authors.initials: YY
authors.lastname: Peng
keywords: (E)-3-(2-aminoaryl)acrylate; (E)-3-(2-aminoaryl)acrylonitrile; 4H-3,1-benzothiazine-2-thione; Michael addition; carbon disulfide