Synthesis of methylpyridines by catalytic method in the gas phase Sardor Kodirov, Bakhodir Mukhiddinov, Abduvakhob Ikramov, Khusnitdin Vapoyev, Аbdulla Umrzokov and Sanat Sharipov E3S Web Conf., 417 (2023) 02010 Published online: 21 August 2023 DOI: 10.1051/e3sconf/202341702010