IP Library Granted Patent US 12,590,068
Granted Patent B2
US 12,590,068 · App. 19/313,010 · Granted Mar 31, 2026

Crystalline salts of a plasma kallikrein inhibitor

Inventors: Yahya El-Kattan (Vestavia Hills, AL); Yarlagadda S. Babu (Birmingham, AL)
Assignee: BioCryst Pharmaceuticals, Inc.
C07D231/14A61K9/0029A61K9/0053A23L33/10A23V2002/00C07B2200/13
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,590,068
App. No.
19/313,010
Granted
Mar 31, 2026
Kind
B2
Abstract

Disclosed are crystalline salts of Compound I, methods of preparing them, and related pharmaceutical preparations thereof. Also disclosed are methods of treatment using the crystalline salts of the invention.

Claims (32)

1 . A crystalline salt of compound I,

wherein the crystalline salt is a bis(hydrochloride) salt and contains less than 10% of the corresponding amorphous compound.

2 . The crystalline salt of claim 1 , wherein the crystalline salt contains less than 5% of the corresponding amorphous compound.

3 . The crystalline salt of claim 1 , wherein the crystalline salt contains less than 2% of the corresponding amorphous compound.

4 . The crystalline salt of claim 1 , wherein the crystalline salt has an XRPD pattern substantially similar to that shown in FIG. 1 .

5 . The crystalline salt of claim 2 , wherein the crystalline salt has an XRPD pattern substantially similar to that shown in FIG. 1 .

6 . The crystalline salt of claim 3 , wherein the crystalline salt has an XRPD pattern substantially similar to that shown in FIG. 1 .

7 . The crystalline salt of claim 1 , wherein the crystalline salt has a spectrum substantially similar to that shown in FIG. 2 .

8 . The crystalline salt of claim 2 , wherein the crystalline salt has a spectrum substantially similar to that shown in FIG. 2 .

9 . The crystalline salt of claim 3 , wherein the crystalline salt has a spectrum substantially similar to that shown in FIG. 2 .

10 . A pharmaceutical composition comprising a crystalline salt of compound I,

and one or more pharmaceutically acceptable carriers, wherein said composition is for oral administration, and wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers is a bis(hydrochloride) salt that contains less than 10% of the corresponding amorphous compound.

11 . The pharmaceutical composition of claim 10 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers contains less than 5% of the corresponding amorphous compound.

12 . The pharmaceutical composition of claim 10 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers contains less than 2% of the corresponding amorphous compound.

13 . The pharmaceutical composition of claim 10 , wherein said composition contains a therapeutically effective amount of said crystalline salt for prophylaxis to prevent attacks of hereditary angioedema.

14 . The pharmaceutical composition of claim 11 , wherein said composition contains a therapeutically effective amount of said crystalline salt for prophylaxis to prevent attacks of hereditary angioedema.

15 . The pharmaceutical composition of claim 12 , wherein said composition contains a therapeutically effective amount of said crystalline salt for prophylaxis to prevent attacks of hereditary angioedema.

16 . The pharmaceutical composition of claim 13 , wherein said composition is an oral dosage form comprising about 125 to about 175 mg of the crystalline salt.

17 . The pharmaceutical composition of claim 14 , wherein said composition is an oral dosage form comprising about 125 to about 175 mg of the crystalline salt.

18 . The pharmaceutical composition of claim 15 , wherein said composition is an oral dosage form comprising about 125 to about 175 mg of the crystalline salt.

19 . The pharmaceutical composition of claim 16 , wherein the hereditary angioedema is type I hereditary angioedema or type II hereditary angioedema.

20 . The pharmaceutical composition of claim 17 , wherein the hereditary angioedema is type I hereditary angioedema or type II hereditary angioedema.

21 . The pharmaceutical composition of claim 18 , wherein the hereditary angioedema is type I hereditary angioedema or type II hereditary angioedema.

22 . The pharmaceutical composition of claim 10 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has an XRPD pattern substantially similar to that shown in FIG. 1 .

23 . The pharmaceutical composition of claim 11 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has an XRPD pattern substantially similar to that shown in FIG. 1 .

24 . The pharmaceutical composition of claim 12 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has an XRPD pattern substantially similar to that shown in FIG. 1 .

25 . The pharmaceutical composition of claim 16 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has an XRPD pattern substantially similar to that shown in FIG. 1 .

26 . The pharmaceutical composition of claim 17 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has an XRPD pattern substantially similar to that shown in FIG. 1 .

27 . The pharmaceutical composition of claim 18 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has an XRPD pattern substantially similar to that shown in FIG. 1 .

28 . The pharmaceutical composition of claim 10 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has a spectrum substantially similar to that shown in FIG. 2 .

29 . The pharmaceutical composition of claim 11 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has a spectrum substantially similar to that shown in FIG. 2 .

30 . The pharmaceutical composition of claim 12 , wherein the crystalline salt that is formulated with the one or more pharmaceutically acceptable carriers has a spectrum substantially similar to that shown in FIG. 2 .

Assignments (3)
SECURITY INTEREST Recorded Jan 23, 2026
From: BIOCRYST PHARMACEUTICALS, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 074485/0651 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 12, 2026
From: EL-KATTAN, YAHYA; BABU, YARLAGADDA S.
To: BIOCRYST PHARMACEUTICALS, INC.
Reel/Frame 073440/0481 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 5, 2025
From: EL-KATTAN, YAHYA; BABU, YARLAGADDA S.
To: BIOCRYST PHARMACEUTICALS, INC.
Reel/Frame 072171/0946 →
Continuity (7)
Continuation 19224669 · May 30, 2025
Continuation In Part 18120073 · Mar 10, 2023
Continuation 17465181 · Sep 2, 2021
Continuation 16784016 · Feb 6, 2020
Continuation 16671649 · Nov 1, 2019
Provisional Application 62754983 · Nov 2, 2018
Related Publication 20250388549A1 · Dec 25, 2025
References Cited (35)
US 4559157A · Smith et al. · 1985 [cited by applicant]
US 7371864B2 · Orwat et al. · 2008 [cited by applicant]
US 9206146B2 · Langner et al. · 2015 [cited by applicant]
US 10125102B2 · Kotian et al. · 2018 [cited by applicant]
US 10329260B2 · Kotian et al. · 2019 [cited by applicant]
US 10662160B1 · El-Kattan et al. · 2020 [cited by applicant]
US 11117867B2 · El-Kattan et al. · 2021 [cited by applicant]
US 11618733B2 · El-Kattan et al. · 2023 [cited by applicant]
US 12344585B2 · El-Kattan et al. · 2025 [cited by applicant]
US 20060148846A1 · Orwat et al. · 2006 [cited by applicant]
US 20150191421A1 · Northen et al. · 2015 [cited by applicant]
US 20180354906A1 · Kotian et al. · 2018 [cited by applicant]
US 20190322626A1 · Kotian et al. · 2019 [cited by applicant]
US 20200140389A1 · El-Kattan et al. · 2020 [cited by applicant]
US 20200308118A1 · El-Kattan et al. · 2020 [cited by applicant]
US 20220204454A1 · El-Kattan et al. · 2022 [cited by applicant]
US 20240109844A1 · El-Kattan et al. · 2024 [cited by applicant]
WO WO2008016883A2 · 2008 [cited by applicant]
WO WO2012121764A1 · 2012 [cited by applicant]
WO WO2014006414A1 · 2014 [cited by applicant]
WO WO2015134998A1 · 2015 [cited by applicant]
WO WO2017059178A1 · 2017 [cited by applicant]
WO WO2020092898A1 · 2020 [cited by applicant]
WO WO2021026182A1 · 2021 [cited by applicant]
Aygoren et al., “BCX7353: an Effective and Safe Oral Prophylaxis Against Attacks of Hereditary Angioedema. APeX-1 Final Results,” BioCryst Pharmaceuticals, Presented at ACAAI (2017). [cited by applicant]
Aygören-Pürsün et al., “Oral Plasma Kallikrein Inhibitor for Prophylaxis in Hereditary Angioedema,” The New England Journal of Medicine, 379(4):352-362 (2018). [cited by applicant]
Aygören-Pürsün, “BCX7353, a Once-Daily Oral Kallikrein Inhibitor, is Effective and Safe in the Prophylaxis of Acute Attacks in Patients with Hereditary Angioedema: Results from the First Interim Analysis of the APeX-1 S… [cited by applicant]
Balbach et al., “Pharmaceutical evaluation of early development candidates ,‘The 100 mg approach.’” International Journal of Pharmaceutics, 2004, vol. 275, pp. 1-12. [cited by applicant]
Byrn et al., “Pharmaceutical Solids: A Strategic Approach to Regulatory Considerations,” Pharmaceutical Research, 12: 945-954 (1995). [cited by applicant]
Extended European Search Report for EP Application No. 19877809.4 dated May 25, 2022. [cited by applicant]
Hwang et al., “Oral plasma kallikrein inhibitor BCX7353 for treatment of hereditary angioedema”, Immunotherapy, 11(17): 1439-1444 (2019). [cited by applicant]
ICH Steering Committee, “Test Procedures and Acceptance Criteria for New Drug Substances and New Drug Products”, Pharmaceutical Affairs Bureau Notification, vol. 568, (2001). [cited by applicant]
International Preliminary Report on Patentability for International Application No. PCT/US19/59385 dated May 14, 2021. [cited by applicant]
International Search Report and Written Opinion for International Application No. PCT/US19/59385 dated Jan. 17, 2020. [cited by applicant]
Singhal et al., “Drug polymorphism and dosage form design: a practical perspective.” Advanced Drug Delivery Reviews, 2004, vol. 56, pp. 335-347. [cited by applicant]