反应详情

1-Methoxy-2-methyl-2-propanol (3.50 ml, 30 mmol) was treated with 4-nitrophenyl chloroformate according to conditions similar to the ones described above with respect to Intermediate 2, Step 2 to provide, after purification by column chromatography over silica gel (eluting with Hexanes/EtOAc 99:1 to 70:30), 1-methoxy-2-methylpropan-2-yl 4-nitrophenyl carbonate (7.02 g, 87% yield) as a colorless oil. 1H-NMR (300 MHz, CDCl3) δ 8.26 (d, J=9.2 Hz, 2H), 7.36 (d, J=9.2 Hz, 2H), 3.56 (s, 3H), 3.43 (s, 3H), 1.57 (s, 6H).

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