反应详情

tert-Butyl (Z)-2-(hydroxyimino)-3-oxobutyrate (7.36 g) was treated with 4-nitrobenzyl 4-hydroxycyclohexanecarboxylate as described in Example 4, Method 3 to give the title compound (5.1 g, 29%) as a gum. νmax (film) 2950, 1740, 1695, and 1525cm-1, δH (CDCl3) 1.53 (9H, s), 1.62 (3H, m), 1.82 (1H, m), 2.14 (4H, m), 2.37 (3H, s), 2.45 (1H, tt, J 3.7 Hz, 10.7 Hz), 4.26 (1H, tt, J 3.8, 9.8 Hz), 5.22 (2H, s), 7.51 (2H, d), and 8.24 (2H, d). δC (CDCl3) 25.2, 26.2, 28.1 (3C), 29.8, 41.6, 64.7, 82.7, 84.0, 123.8 (2C), 128.3 (2C), 143.3, 147.7, 150.7, 160.6, 174.5 and 193.0. [Mass spectrum (ammonia) MNH4+ (466)].