Reaction of guanidine with peri-substituted (R-ethynyl)-9,10-anthraquinones bearing electron-donating substituents
作者:D. S. Baranov、S. F. Vasilevsky
DOI:10.1007/s11172-010-0200-6
日期:2010.5
Abstract2-Amino-3-aroyl-7H-dibenzo[de,h]quinolin-7-ones were synthesized by the reaction of guanidine with peri-(R-ethynyl)-9,10-anthraquinones in boiling n-butanol.
In situ generated reagent from sulfur for alkynylanthraquinone cyclization. The simple synthesis of angular thienoanthraquinones
作者:Lidiya G. Fedenok、Kirill Yu. Fedotov、Elena A. Pritchina、Nikolaj E. Polyakov
DOI:10.1016/j.tetlet.2016.02.025
日期:2016.3
for thiophene ring formation via the direct CH cyclization of 1-alkynyl-9,10-anthra(4-alkynyl-1-aza-9,10-anthra)quinones to give the corresponding thienoanthraquinones has been developed. A highly effective sulfinating agent was generated in situ by the reaction of elemental sulfur and alkali. It was also shown that this reagent is effective in the cyclization reaction with replacement of the chlorine