azetidine structures, is discussed. The conditions developed to effect an asymmetric TMM reaction using 2-trimethylsilylmethyl allyl acetate were shown to be tolerant of a wide variety of alkene acceptors, providing the desired methylenecyclopentanes with high levels of enantioselectivity. The donor scope was also explored, and substituted systems were tolerated, including one bearing a nitrile moiety. These
已经开发了三亚甲基
甲烷 (TMM) 与缺电子烯烃的对映选择性 [3+2] 环加成的协议。在这项工作中,新型亚
磷酰胺
配体的合成至关重要,并且详细介绍了这些
配体的制备和反应性。讨论了
配体设计的演变,从无环胺衍生的亚
磷酰胺开始,并导致环状
吡咯烷和氮杂
环丁烷结构。为使用
乙酸 2-三甲基甲
硅烷基甲基烯
丙酯进行不对称 TMM 反应而开发的条件被证明可以耐受多种烯烃受体,从而提供具有高
水平对映选择性的所需
亚甲基环戊烷。还探索了供体范围,并且可以容忍替代系统,包括带有腈部分的系统。