catalyze the enantioselective asymmetric γ‐addition of heteroaromatic compounds to allenoates in good yields with high enantiomeric ratios and regioselectivity in the presence of (S)‐BINOL. Both pyrazole and imidazole could be employed in this process. The synthetic value of these γ‐addition products was demonstrated by the preparation of biologically relevant molecules and structural scaffolds. Remarkably
在(S)‐BINOL存在的情况下,发现手性膦可以高收率催化杂芳族化合物的对映体选择性不对称γ加成,从而获得高收率的对映体比例和区域选择性。
吡唑和
咪唑均可用于该方法。制备
生物学上相关的分子和结构支架证明了这些γ加成产物的合成价值。值得注意的是,该策略的合成效用通过Janus激酶(JAK)
抑制剂的两步合成得到了证明。