Patent ID: 11951083
Assignee: CYTOMETIX, INC.
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  C | IPC A  C

Claim 6:
7. The method of claim 1, further providing a second intermediate salt, further comprising the steps of:, , and
using a second acid with compound 4 to form the second intermediate salt; and
purifying the second intermediate salt by crystallization,
wherein A2 applies a second amine base selected from the group consisting of (i) isopropylamine and (ii) isopropylamine salt with a suitable base, and R2 is selected from the group consisting of a C3-C6 cycloalkyl substituted amine, a C5-C6 cycloalkenyl substituted amine (excluding enamines), and an ester, and wherein the second intermediate salt is crystalline;, and
wherein compound 3 is derived from compound 2.