Scheme 3: Synthesis of aldehyde for 4C-MOM.
Reagents and Conditions: (a) NaBH4, MeOH, 0 °C to R.T. 1 h (b) MeI, NaH, DMF, 0 °C to R.T. 86% over two steps; (c) n-butyllithium, DMF, diethyl ether, 0 °C to 35 °C, 10 min, 66%
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