A cyanoborohydride‐promoted radicalcyclization methodology has been developed to access α‐chlorolactams in a simple and efficient way using NaBH3CN and trichloroacetamides easily available from allylic and homoallylic secondary amines. This methodology allowed the synthesis of a library of α‐chlorolactams (mono‐ and bicyclic), which were tested for herbicidal activity, trans‐3‐chloro‐4‐methyl‐1‐(
This disclosure describes 2- or 3-[(unsaturated or cyclopropylated alkyl)amino]phenyl compounds and derivatives useful as hypolipidemic and antiatherosclerotic agents.
Improved yields of meta-amination and symmetrical and unsymmetrical diamination of benzenes
作者:George R Brown、Alan J Foubister、Craig A Roberts、Stuart L Wells、Robin Wood
DOI:10.1016/s0040-4039(01)00582-2
日期:2001.6
Much higher yields were found after shorter reaction times for the meta-substituted amination of benzenes in DMPU with microwave heating in a sealed tube (180°C, 5 h), e.g. piperidine and m-fluorobenzonitrile 1 gave the m-substituted 3 in 92% yield. These modified reaction conditions also afforded a new synthesis of unsymmetrical diamines in >80% yield.