Linear hydroformylation of N-protected allyl- or homoallylamines (cyclohydrocarbonylation: CHC), followed by a reductive amination constitute the two key steps toward convenient routes to aza-heterocycles.
                                    N-保护的烯丙基或高
烯丙基胺的线性加氢甲酰化(环氢羰基化:CHC),然后进行还原性胺化,是通往氮杂杂环便利途径的两个关键步骤。