Le. Brieaddy et Kh. Donaldson, THE SYNTHESIS OF IARYL-6H,12H-DIBENZO[B,F][1,5]DITHIOCIN-6,12-IMINE AND HENYL-6,12-EPOXY-6H,12H-DIBENZO[B,F][1,5]DITHIOCIN, Journal of heterocyclic chemistry, 32(6), 1995, pp. 1683-1686
When treated with concentrated hydrochloric acid or heated beyond its
melting point, the versatile thioimine 2 2-mercaptobenzhydrylidenamine
was unexpectedly converted to the title ring system. Also, this imine
can be converted to 3-phenyl-1,2-benzisothiazoles by prolonged exposu
re to air.