SCHEME 2.
Synthesis of IMTi-1 and analogs 1a-o Key: i) 3N HCl, Dioxane. microwave, 100°C, 2 h ii) Pd2(dba)3, XanthPhos, Cs2CO3, 1,4-Dioxane, microwave, 100°C. iii) 4M HCl in dioxane, EtOAc, RT, 2 h iv) CH2O, NaCNBH3, DCE, 0°C - RT, 16 h.
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