Scheme 1.
a) THF, rt, 7 days, 83 %; b) CH3I, K2CO3, DMF, 80 °C, 16 h, 81 %;14 c) NaClO2, NaH2PO4, 2‐methyl‐2‐butene, THF, H2O, rt, 16 h, 21 %, d) CH2Cl2/NEt3, 16 h, rt.
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