Syntheses of 7H-pyrido-and 7H-pyrano[2,3,4-kl]acridin-2(3H)-ones from 9-chloroacridines
作者:M. V. Gorelik、S. P. Titova、E. V. Gordievskaya
DOI:10.1007/s11172-006-0471-0
日期:2006.9
A method for peri-annulation of the pyridine or pyran ring to acridine was developed and used to obtain 7H-pyrido-and 7H-pyrano[2,3,4-kl]acridin-2(3H)-ones. The peri-groups were formed by a reaction of 9-chloro-1-nitroacridine with a CH-acid (malononitrile, ethyl cyanoacetate, and ethyl malonate) followed by reduction of the nitro group, or by a reaction of 1-amino-10-methylacridone with PCl5 and then with a CH-acid. Replacement of the chlorine atom in 9-chloro-1-methoxyacridines by the residue of the CH-acid with subsequent heating in an acidic medium afforded 7H-pyrano[2,3,4-kl]acridin-2(3H)-ones, which belong to a novel heterocyclic system.
一种用于对阿克里啉进行吡啶或吡喃环的旁环化方法被开发出来,并用于获得7H-吡啶和7H-吡喃[2,3,4-kl]阿克里啉-2(3H)-酮。旁基团是通过9-氯-1-硝基阿克里啉与CH酸(丙二腈、乙基氰基乙酸盐和乙基马来酸盐)反应后,减少硝基,或通过1-氨基-10-甲基阿克里啉与PCl5反应,再与CH酸反应形成的。通过将9-氯-1-甲氧基阿克里啉中的氯原子替换为CH酸的残留物,并在酸性介质中加热,得到了7H-吡喃[2,3,4-kl]阿克里啉-2(3H)-酮,这属于一种新颖的杂环体系。