Problem+10

Source: He, P., Zhu, S. **2005**. //Tetrahedron// 61, 12398 – 12404. LEVEL: Advanced undergraduate, 1st – 2nd year graduate student DIFFICULY: 6/10

There are various facets to this problem as it involves three products in two different reactions. Also, replacing N-H with N-Me changes the course of reaction altogether Despite the apparent difficulty, accessible ways may be found if due attention is paid to reagent **2**.

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