regioselectively (SN2 mechanism). Addition to an enone or α,β-unsaturated ester occurs by 1,4-addition. Asymmetric deprotonation of N-Boc-pyrrolidine or dynamic resolution in the presence of a chiral ligand of N-Boc-2-lithiopiperidine followed by the zinc/copper chemistry was successful and gave the allylated pyrrolidine and piperidine products with good enantioselectivity, although use of the copper iodide
铜盐已被筛选的转移
金属化和电淬火ñ -叔丁氧羰基-2- lithiopyrrolidine(Ñ -Boc-2- lithiopyrrolidine)和Ñ -Boc-2- lithiopiperidine,通过去质子化而形成Ñ -Boc -
吡咯烷和ñ - Boc-
哌啶分别。然后,用
氯化锌(溶解了
氯化锂)进行重
金属化,然后进行烯丙基化,生成区域异构体的混合物(S N 2和S N 2'产物),而用
碘化
铜·TME
DA进行重
金属化,则区域选择性地进行烯丙基化(S N2机制)。通过1,4-加成发生烯键或α,β-不饱和酯的加成。N -Boc-
吡咯烷的不对称去质子化或在N -Boc-2-lithiopiperidine的手性
配体存在下的动态拆分以及随后的
锌/
铜化学反应是成功的,尽管使用了N -Boc-2-lithiopiperidine的手性
配体,但烯丙基化的
吡咯烷和
哌啶产物具有良好的对映选择性
碘化
铜的化