Efficient Multicomponent Synthesis of α-Trifluoromethyl Proline, Homoproline, and Azepan Carboxylic Acid Dipeptides - Gulevich, Anton V.; Shevchenko, Nikolay E.; Balenkova, Elisabeth S.; Röschenthaler, Gerd-V.; Nenajdenko, Valentine G. (Synlett, 2009)