反应详情

To a mixture of 1.05 g (7.1 mmol) of isatin in 15 mL of ether in ice-bath was added dropwise a solution of diazomethane in ether (prepared from 4.4 g (20 mmol) of Diazald according to Aldrichimica Acta 16:3 (1983)). The resulting solution was stirred in ice-bath for 3 h then room temperature overnight. The mixture was filtered and dried to leave white solid 0.684 g (52%), mp 188°-189° C. (lit. 191° C.; Greibrokk and Undheim, Acta Chem. Scand. 25:2935 (1971)). 1H NMR (CDCl3) 3.977 (s, 3), 7.014 (s, 1), 7.21 (m, 1), 7.39 (m, 2), 7.509 (d, 1, J=7.8), 11.429 (s, 1).

1. customroom temperature overnight
2. filtrationThe mixture was filtered
3. customdried