反应详情

Reaction of (2,2-dimethyl-5-oxo-[1,3]dioxolan-4-ylidene)-acetyl chloride with N-(2-isopropoxy-benzyl)-O-methyl-hydroxylamine as described in the preparation of compound 1-C gave the title amide as white crystals (93% yield): mp 103° C. (ethyl acetate-hexane). 1HNMR 400 MHz (CDCl3) δ (ppm): 1.34 (6H, d, J=6.0 Hz, CH3), 1.75 (6H, s, CH3), 3.68 (3H, s, OCH3), 4.60 (1H, m, CH), 4.95 (2H, broad s, NCH2), 6.44 (1H, s, CH), 6.89 (2H, m, aromatics), 7.2-7.3 (2H, m, aromatics). Anal. calcd for C18H23NO6: C, 61.88; H, 6.64; N, 4.01. Found: C, 61.22; H, 6.33; N, 3.87.