Patent ID: 11926577
Assignee: P2 SCIENCE, INC.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 24:
25. The method of claim 1, wherein in step (A) the Compound 3 is reacted with 0.95 to 2 equivalents of hydrazine monohydrate, and wherein in step (B) the intermediate Compound 3-A is treated with a base selected from the group consisting of lithium hydroxide, sodium hydroxide, and potassium hydroxide in a solvent selected from the group consisting of water, methanol, ethanol, propanol, isopropanol, n-butanol, tert-butanol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, and a mixture thereof.