141402-20-2Relevant articles and documents
Synthesis of 1,8-, 1,6- and 3,6-Dichloro-9H-thioxanthen-9-ones
Okabayashi, Ichizo,Fujiwara, Hidetoshi,Tanaka, Chika
, p. 1977 - 1979 (2007/10/02)
Cyclization of 2-chloro-6-benzoic acid (2) gave a mixture of 1,8-, 3, and 1,6-dichloro-9H-thioxanthen-9-ones 4.The mixture was converted to 1,8-diamino- 7, and 1-amino-6-chloro-9H-thioxanthen-9-ones 8, from which 3 and 4 were prepared separately, respectively.From a mixture of 4 and 3,6-dichloro-9H-thioxanthen-9-one (11) obtained by cyclizing 4-chloro-2-benzoic acid (10) was separated 11 by conversion of 4 to 8.