Heilmittelchemische Studien in der heterocyclischen Reihe. 27. Mitteilung Hydropyridine I Die Reduktion von 1-Methyl-3-cyan-pyridiniumjodid mit Natriumborhydrid
作者:K. Schenker、J. Druey
DOI:10.1002/hlca.19590420626
日期:——
Reduction of 1-methyl-3-cyano-pyridinium iodide with excess sodium borohydride has been found to give l-methyl-3-cyano-l,2,5,6-tetrahydro-pyridine (I) and l-methyl-3-cyano-l,6-dihydro-pyridine (II a) in approximately equal yields.The constitution of IIa was deduced by comparison with l-methyl-3-cyano-1,4-dihydro-pyridine (II b), obtained exclusively on treatment of 1-methyl-3-cyano-pyridinium iodide
已经发现用过量的硼氢化钠还原1-甲基-3-氰基-吡啶鎓碘化物可得到1-甲基-3-氰基-1、2,5,6-四氢吡啶(I)和1-甲基-3-甲基。氰基-1-,6-二氢吡啶(IIa)的收率大致相等。通过与仅在上位获得的1-甲基-3-氰基-1,4-二氢吡啶(IIb)的比较推论得出IIa的结构用连二亚硫酸钠处理1-甲基-3-氰基吡啶鎓碘化物,并通过催化加氢生成1-甲基-3-氰基-1,4,5,6-四氢吡啶(III)。