Diastereoselective synthesis of 2-vinylpyrrolidines and 2-vinylpiperidines by the palladium-catalysed cyclization of amino-allylic carbonates containing a chiral protecting group
An efficient diastereoselectivesynthesis of pyrrolidineand piperidine-type N-heterocycles is reported, by the intramolecular Pd(0)-catalysed cyclization of amino carbonatescontainingchiralprotectinggroup. The use of chiral auxiliary in the cyclization gave the corresponding heterocyclic derivatives in excellent yields and with good dr values.
通过分子内 Pd(0) 催化的含有手性保护基团的氨基碳酸酯的环化反应,报道了一种有效的非对映选择性合成吡咯烷和哌啶型 N-杂环。在环化中使用手性助剂以优异的产率和良好的 dr 值得到相应的杂环衍生物。