1,3-Thiazole-2-carbaldehyde → HCID 22018687, Verbindung

To a stirred solution of N-(t-butyloxycarbonyl)-N-(2-pyridinylmethyl)-N′-(5,6,7,8-tetrahydro-8-quinolinyl)-1,4-benzenedimethanamine (0.295 g, 0.643 mmol) in anhydrous methanol (6.5 mL), at room temperature, was added thiazole-2-carboxaldehyde (0.33 mL, 3.76 mmol) followed by NaBH3CN (0.131 g, 2.09 mmol) and the resultant solution was stirred at room temperature. After 2 days, an additional amount of NaBH3CN (0.134 g, 2.10 mmol) was added and the solution was stirred at room temperature for an additional 4 days. The solvent was removed under reduced pressure and CH2Cl2 (20 mL) and water (10 mL) were added to the residue. The phases were separated and the aqueous phase was extracted with CH2Cl2 (3×10 mL). The combined organic phases were dried (Na2SO4) and concentrated. Purification of the crude material by radial chromatography on silica gel (2 mm plate, 40:1 CH2Cl2-MeOH containing 1% NH4OH) afforded 0.164 g of the protected amine as a yellow oil.

1. customThe solvent was removed under reduced pressure and CH2Cl2 (20 mL) and water (10 mL)
2. additionwere added to the residue
3. customThe phases were separated
4. extractionthe aqueous phase was extracted with CH2Cl2 (3×10 mL)
5. dry with materialThe combined organic phases were dried (Na2SO4)
6. concentrationconcentrated
7. customPurification of the crude material by radial chromatography on silica gel (2 mm plate, 40:1 CH2Cl2-MeOH containing 1% NH4OH)

ORD-Eintrag

ord-6097331d763f4ce5ad28cf7327b2efb8

Quelldatensatz

uspto-grants-2007_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07183273B2