%0 Journal Article
%T 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
%A Qiuping Ding
%A Yuqing Lin
%A Guangni Ding
%A Fumin Liao
%J Beilstein Journal of Organic Chemistry
%D 2013
%I 
%R 10.3762/bjoc.9.49
%X 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.
%K 4H-3
%K 1-benzothiazine-2-thione
%K carbon disulfide
%K (E)-3-(2-aminoaryl)acrylate
%K (E)-3-(2-aminoaryl)acrylonitrile
%K Michael addition
%U http://dx.doi.org/10.3762/bjoc.9.49