Diisopropylcarbodiimide → HCID 69585728, Verbindung

In a 4-ml scintillating vial, a solution of 2-amino-5-aminomethyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester (58 mg, 0.2 mmol) in tetrahydrofuran (2.0 ml) was treated with 4-nitrophthalic acid (63 mg, 0.3 mmol), diisopropylethylamine (190 μl, 1.1 mmol), and 1,3-diisopropylcarbodiimide (120 μl, 0.77 mmol). The reaction mixture was shaken vigorously for 10 seconds before being stirred at 50° C. for 43 hours and at room temperature for 20 hours. The solution was diluted with ethyl acetate (25 ml), washed with 0.5N aqueous hydrochloric acid (25 ml), saturated aqueous sodium bicarbonate (25 ml), and the brine (25 ml). The organic layer was dried (MgSO4), filtered and the solvent evaporated in vacuo. Crude 2-amino-5-(5-nitro-1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester was obtained as a solid and used immediately in the next step.

1. stirringbefore being stirred at 50° C. for 43 hours and at room temperature for 20 hours
2. washwashed with 0.5N aqueous hydrochloric acid (25 ml), saturated aqueous sodium bicarbonate (25 ml)
3. dry with materialThe organic layer was dried (MgSO4)
4. filtrationfiltered
5. customthe solvent evaporated in vacuo

ORD-Eintrag

ord-45fcd26aaee3473d941c5e5c36c19002

Quelldatensatz

uspto-grants-2006_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07019026B1