The formal [3+2] cycloaddition of 1,3,5-triaryl-1,3,5-triazinanes with donor-acceptor cyclopropanes has been found to provide pyrrolidines in good to excellent yields under mild reaction conditions. Preliminary mechanistic investigation indicates that this formal [3+2] cycloaddition reaction proceeds through competing S_N1 and S_N2 pathways.

中文翻译：

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通过1,3,5-三嗪并有供体-受体环丙烷的[3 + 2]环加成反应获得取代的吡咯烷

已经发现，在温和的反应条件下，将1,3,5-三芳基-1,3,5-三嗪酮与供体-受体环丙烷进行正式的[3 + 2]环加成反应可提供吡咯烷类化合物。初步的机理研究表明，这种正式的[3 + 2]环加成反应是通过竞争性的S _N 1和S _N 2途径进行的。