Scheme 3.
Synthesis pathways for access to compounds 9–11. Reagents and conditions: (a) C6H5CH2Br, TEA, CH2Cl2, rt, overnight, 79%; (b) LiAlH4, THF, rflx, 3 H, 89%; (c) (ClCO)2, DMSO, TEA, CH2Cl2, −48 °C, 15 min, 60%.
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