Synthesis of different types of valerolactams starting from 2,5-dihydrooxazoles
摘要:
Tricyclic valerolactams characterized by a variable heteroatom in gamma-position, for example, sulfur, oxygen or nitrogen, were synthesized starting from 2,5-dihydrooxazoles. The chosen synthetic procedures included the addition of thiosalicylic acid as well as the addition of salicyl chloride. The nitrogen containing lactams were prepared in a cycloaddition and subsequent oxidation. (C) 2009 Elsevier Ltd. All rights reserved.