derivatives are efficiently deprotonated with strong bases to form α‐chlorocarbanions. These anions are long‐lived enough to enter VNS reactions with nitroarenes or nitroheteroarenes to give a variety of unsymmetrical o‐ and p‐nitrodiarylmethanes. Selectivity of the reaction can be controlled to some extent by changing metal counterions of the base.
苄基
氯及其衍
生物可以用强碱有效地去质子化,形成α-
氯碳阴离子。这些阴离子具有足够长的寿命,可以与硝基
芳烃或硝基杂
芳烃进入VNS反应,生成各种不对称的邻硝基和对硝基二芳基
甲烷。通过改变碱的
金属抗衡离子,可以在一定程度上控制反应的选择性。