The radical reactions of N-(2-halogenoalkanoyl)-substitutedanilines (anilides) of type 1 have been investigated under various conditions. Treatment of compounds 1a–1o with Bu3SnH in the presence of (2,2′-azobis(isobutyronitrile) (AIBN) afforded a mixture of the indolones (oxindoles) 2a–2o and the reduction products 5a–5o (Table 1). In contrast, the N-unsubstituted anilides 1p–1s, 1u, and 1v gave the
New 3-benzisothiazolyl and 3-benzisoxazolylpiperazine derivatives were synthesised and their 5-HT1A, 5-HT2A and D-2 receptor binding affinities evaluated. The compounds displayed high affinity for the 5-HT2A receptor combined with moderate to low 5-HT1A and D-2 affinities. Two of them, 18 and 25, have been selected for further pharmacological studies to be evaluated as potential atypical antipsychotics. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.