ChemInform Abstract: Synthesis of 4‐Aryl‐4‐methyl‐ and 4,4‐Dimethyl‐4H‐pyrrolo[2,1‐c][1,4]benzothiazines by an Easy Five‐Step Sequence Starting from 2‐Sulfanylbenzenamines.

Abstract

Synthesis of 4-Aryl-4-methyl-and 4,4-Dimethyl-4H-pyrrolo[2,1-c][1,4]benzothiazines by an Easy Five-Step SequenceStarting from 2-Sulfanylbenzenamines. -Precursor (XII) is prepared analogously to (VII) following the sequence A)-D). The final cyclization is achieved in the presence of catalytic HI. -(KOBAYASHI*, K.; HYOTA, A.; KONDO, H.; IMAOKA, A.; Synthesis 2012, 19, 3019-3026, http://dx.doi.org/10.1055/s0032-1316769 ; Dep. Chem. Biotechnol., Grad. Sch. Eng., Tottori Univ., Koyama, Tottori 680, Japan; Eng.) -Mais 04-131