Claims
- 1. A process for obtaining in crystalline form a compound (SEQ ID No. 1) having the formula: ##STR4## which comprises (1) solubilizing the compound in aqueous n-propanol at about 55.degree. to 65.degree. C. and
- (2) allowing the solution to stand at ambient temperature until crystal formation is substantially complete.
- 2. A process according to claim 1 wherein the aqueous n-propanol is n-propanol with a water content of from about 2 to 8 percent based upon volume.
- 3. A process according to claim 1 wherein the aqueous n-propanol is n-propanol with a water content of from about 3.5 to 4 percent based upon volume.
Parent Case Info
This is a continuation-in-part of application Ser. No. 07/692,073 filed May 1, 1991, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5198421 |
Chen et al. |
Mar 1993 |
|
5202309 |
Schwartz et al. |
Apr 1993 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
0405997 |
Jan 0291 |
EPX |
Non-Patent Literature Citations (1)
Entry |
Weissberger, Technique of Org. Chem., Part 1, Separation & Purif. (Intersci. Pub. Inc. New York), 1956, pp. 548-561. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
692073 |
May 1991 |
|