Syntheses of Acridines and Quinazoline-2,4(1H,3H)-dithiones by Rearrangements of N-Heterocyclic Carbenes of Indazole
作者:Andreas Schmidt、Zong Guan、Mimoza Gjikaj
DOI:10.3987/com-14-13082
日期:——
N-Heterocyclic carbenes of indazole which are arylated at N1 (1-aryl-indazol-3-ylidenes) have been generated by deprotonation of the corresponding indazolium salts. On deprotonation with potassium carbonate, potassium phosphate or tert-butanolate in dioxane or toluene at reflux temperature, a rearrangement to acridines took place. Deprotonation with n-butyllithium in THF at room temperature in the presence of carbon disulfide gave quinazoline-2,4(1H,3H)-dithiones by a new rearrangement reaction.