Dm. Fink et Jt. Strupczewski, PREPARATION OF 6-FLUOROBENZISOTHIAZOLES VIA A REGIOSELECTIVE NUCLEOPHILIC AROMATIC-SUBSTITUTION REACTION, Tetrahedron letters, 34(41), 1993, pp. 6525-6528
An efficient three step procedure for the preparation of 6-fluoro- 1,2
-benzisothiazoles is described. The key step is a regioselective nucle
ophilic aromatic substitution reaction in which the carbonyl group of
a ketone or aldehyde directs nucleophilic displacement to the ortho po
sition in preference to the para position.