Synthesis of Novel Tricyclic Aryltriazole‐3‐Thione Compounds
摘要:
A new synthetic protocol has been developed to provide entry into a series of novel tricyclic aryltriazole-3-thiones analogs. The classical reaction conditions of subjecting an arylhydrazide with thiophosgene to form the thioisocyanate intermediate and ultimately the corresponding aryltriazole-3-thione framework were not successful. However, using a combination of carbon disulfide and 1,8-diazabicyclo[5.4.0]undec7-ene (DBU) to form the thioisocyanate intermediate was found to produce the novel tricyclic aryltriazole-3-thiones (5, 8a-c) in good yield.