反应详情

A suspension consisting of 0.5 g (1.25 mmole) of 3-(1-methyl-3-indolyl)-4-(1-methyl-6-nitro-3-indolyl)-1H-pyrrole-2,5-dione (See Davis U.S. Pat. No. 5,057,614), 4.0 ml of formaldehyde solution (37% w/w), and 2.0 ml of water was heated to 125° C. with stirring and with a reflux condensed attached for 14 hours. The reaction mixture was cooled and diluted with water. The red solid was filtered, washed with water and dried. The solid was purified by chromatography using silica gel and a mixture of EtOAc/Hexane as elutant to afford 1-hydroxymethyl-3-(1-methyl-1H-indol-3-yl)-4-(1-methyl-6-nitro-1H-indol-3-yl)-pyrrole-2,5-dione (mp=209-211° C.).

1. temperatureThe reaction mixture was cooled
2. filtrationThe red solid was filtered
3. washwashed with water
4. customdried
5. customThe solid was purified by chromatography
6. additiona mixture of EtOAc/Hexane as elutant