... 11 The underlying chemistry is illustrated by Scheme I, which shows the synthesis of 3-carbethoxy-6 ... in THF (20 mL) was added over 1-2 min to a solution of J.iN(SiMes ... The organic pb was washed (HzO; aqueous NaHCOJ, dried (MgSO,), and evaporated, and the products were ...