Scheme 2. General Preparation of Formyltocopherols 2–4.
Reagents and conditions: (a) NCS, MeOH, rt., 2 h, 95%; (b) MgCl2, Et3N, (CHO)n, THF, reflux, 75%; (c) MOMBr, nBuLi, THF, −5 °C, 2 h, 80%.
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