Вестник ТГПУ им Л.Н. Толстого №4 2007

№ 4, 2007 ВЕСТНИК ТГПУ им. Л. Н. Толстого R = СНз (а), С2Н5(б), Ph (в), цикло-(СН2)4(г) Природа и концентрация кислотного агента оказывает существенное влияние на вы­ ход 2,3-Дигидробензофуран-5-олов. Наилучшие результаты получены при использовании концентрированной соляной кислоты. /. V. Shahkeldyan, У. М. Atroshchenko, I Е. Yakunina, О I. Boikova THE SYNTHESIS OF BYCYCLIC SYSTEMS FROM AROMATIC NITROCOMPOUNDS. THE SYNTHESIS AND STRUCTURES OF N,0-HETEROCYCLIC COMPOUNDS ON THE BASES OF ANIONES ADDUCTES OF 2,4-DINITROPHENOL AND 2,4-DINITRONAPHTHOL It has been developed the two-stage synthesis of 3-azabicyclo[3.3. ljnonene deriva­ tives on the basis of anionic adducts 2,4-dinitronaphthol and 2,4-dinitrophenol. In the arti­ cle authors described the capability of modification of carbonyl group containing struc­ tures with the help of intramolecular ring closure with buildup of an oxygen-containing cycle. Coumarone has been synthesized in conditions of Nef reaction from anionic Yanovsky adducts 2,4-dinitronaphthol and 2,4-dinitrophenol a number 2,3-dihydroben- zofuranes. The structure of the obtained compounds has been studied by modem physical- chemical methods.