— Wei Li

Patents/USRE049918

USRE049918No. USRE049918reissueGranted 4/16/2024

Claims (14)

Claim 1 (Independent)

1. A compound represented by the following structural formula:

Claim 2 (Independent)

2. A method for preparing compound 3b represented by the following structural formula:

Show 12 dependent claims

Claim 3 (depends on 2)

3. The method of claim 2 , wherein the palladium catalyst is palladium on carbon (Pd/C).

Claim 4 (depends on 2)

4. The method of claim 2 , wherein the reaction is carried out in methanol.

Claim 5 (depends on 2)

5. The method of claim 2 , wherein the reaction is carried out at room temperature.

Claim 6 (depends on 5)

6. The method of claim 5 , wherein the reaction is carried out at room temperature overnight.

Claim 7 (depends on 2)

7. The method of claim 2 , wherein the method further comprises purifying compound 3b by silica gel chromatography.

Claim 8 (depends on 3)

8. The method of claim 3 , wherein the reaction is carried out at room temperature.

Claim 9 (depends on 8)

9. The method of claim 8 , wherein the reaction is carried out at room temperature overnight.

Claim 10 (depends on 3)

10. The method of claim 3 , wherein the method further comprises purifying compound 3b by silica gel chromatography.

Claim 11 (depends on 2)

11. The method of claim 2 , wherein the palladium catalyst is palladium on carbon (Pd/C) and the reaction is carried out in methanol.

Claim 12 (depends on 11)

12. The method of claim 11 , wherein the reaction is carried out at room temperature.

Claim 13 (depends on 12)

13. The method of claim 12 , wherein the reaction is carried out at room temperature overnight.

Claim 14 (depends on 11)

14. The method of claim 11 , wherein the method further comprises purifying compound 3b by silica gel chromatography.

No description text available for this patent.