Hydrazine hydrate (1:1) → HCID 135980156, compound

Participants

Reaction Steps

4.5 g (10.6 mM) of 1-(4-hydroxystyryl)-3-methyl-6,7-dimethoxy-2-benzopyrylium perchlorate (m.p. 298° to 300° C. d.) are suspended in 90 ml of 99.5% ethanol, 1.6 ml (31.8 mM) of 100% hydrazine hydrate are added, and the solution is stirred for 2 hours at room temperature. After evaporation at reduced pressure the residue is suspended in 100 ml of water, filtered, washed with 3×5 ml of water, the crude product is resuspended in hot water, filtered, washed with 3×5 ml of water and dried at 80° to 100° C. Yield 2.65g, m.p. 205° to 207° C. (decomp.). This crude product is purified by refluxing in 12 ml of ethanol and subsequent drying. Yield 2.37 g (66.4%), m.p. 209° to 211° C. (decomp.).

Provenance & Evidence