Synthesis of cycloalkano[b]pyridines by multicomponent strategy: ring-size mediated product selectivity, substitution-induced axial chirality and influence of the 14N quadrupole-relaxation
作者:Seeni Maharani、Abdulrahman I. Almansour、Raju Suresh Kumar、Natarajan Arumugam、Raju Ranjith Kumar
DOI:10.1016/j.tet.2016.06.030
日期:2016.7
The one-pot, four-component reactions of cyclooctanone, malononitrile, aromatic aldehydes and alkyl amines led to the unprecedented formation of novel 1-N-alkyl-2-imino-4-aryl-cycloocta[b]pyridines via a six-step domino sequence in a single transformation. In contrast, the lower ring-size cycloalkanones viz. cycloheptanone, cyclohexanone and cyclopentanone afforded the commonly observed product, 2
环辛酮,丙二腈,芳族醛和烷基胺的一锅四组分反应导致通过六步反应空前形成新型1- N-烷基-2-亚氨基-4-芳基-环辛[ b ]吡啶一次转换即可获得多米诺骨牌序列。相反,较低环大小的环烷酮即。环庚酮,环己酮和环戊酮可提供通常观察到的产物,2-苄基氨基-4-芳基-环烷[ b ]吡啶。