Indole-3-Carboxaldehyde → HCID 69637135, compound

Participants

Reaction Conditions

Reaction Steps

Sodium methoxide (0.54 g, 10 mmol) was added in one portion to a solution of 7-hydroxy-2H-1,4-benzothiazin-3(4H)-one (0.91 g, 5 mmol) and indole-3-carboxaldehyde (1.09 g, 7.5 mmol) in dry DMF (5 ml). The mixture was heated at 140° C. for 48 h, allowed to cool and poured into ice water (60 ml). The solid was collected by filtration. The filtrate was acidified to pH=2 with 10% hydrochloric acid and the precipitated solid was collected by filtration. Both precipitates were put together, boiled with toluene and filtered hot to give a solid which was purified by silica gel chromatography using a gradient of (9:1) to (8:2) n-hexane/ethanol as the mobile phase.

Provenance & Evidence