1: 2,6-Dibromopyridine With n-butyllithium in hexane; tert-butyl methyl ether T=-72 - -67°C; 0.666667 h; 2: 1-methyl-4-(pyrrolidin-1-yl-carbonyl)-piperidine in hexane; tert-butyl methyl ether T=-75 - -69°C; 1.33333 h; Product distribution / selectivity;