NOVEL SYNTHESIS OF THIOALKOXY-SUBSTITUTED OXA[9]HELICENES BY THE REACTION OF HELICAL QUINONES WITH THIOLS

摘要

The reaction of helical quinone with thiols in the presence of acid such as HCl,para-toluene sulfonic acid (pTSA), or Yb(OTf)3·3H2O to form resulted in the formation of thioalkoxy-substituted oxa[9]helicenes in moderate to good yields.