PERHYDROFURO[3,2-C]-, PERHYDROPYRANO[3,2-C]-, AND 4-ETHOXY-2-(5-R-FURAN-2- YL)TETRAHYDROQUINOLINES. SYNTHESIS AND TRANSFORMATIONS Article Zubkov F.I., Zaitsev V.P., Piskareva A.M., Eliseeva M.N., Nikitina E.V., Mikhailova N.M., Varlamov A.V. Russian Journal of Organic Chemistry. Vol. 46. 2010. P. 1192-1206