It rings true: The combination of a novel mono(phosphinoamido)-ligated scandium complex such as 2 a-Sc with a boron compound such as B(C₆F₅)₃ results in a unique and highly efficient catalyst for the cis-selective cyclization of 1,5-dienes with the ortho-C(sp²)−H bond of pyridines. The resulting pyridyl-functionalized 1,3-disubstituted cyclopentane derivatives are obtained in excellent yields with high diastereoselectivities.

中文翻译：

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阳离子单（膦酰胺）烷基Scan配合物催化的吡啶具有CH键的1,5-二烯的非对映选择性环化

确实如此：新型单（膦酰胺基）连接的scan络合物（如2 a -Sc）与硼化合物（如B（C ₆ F ₅）_{3）的结合}产生了一种独特且高效的顺式选择性催化剂1,5-二烯与吡啶的邻位-C（sp ²）-H键环合。所得吡啶基官能化的1，3-二取代的环戊烷衍生物以优异的收率获得，具有高非对映选择性。