【简答题】
写出下列反应的主要产物,或必要溶剂或试剂。<img src="https://nimg.ppkao.com/2019-04/caoguanchen/2019041717160174572.png?sign=9f2ecd4f8cd56ae69906a77ef82cf2dd&t=62d57ba3" /><img src="https://nimg.ppkao.com/2019-04/caoguanchen/2019041717165669308.png?sign=ce9638779c08bab553d173fb264cb9af&t=62d57ba3" />