反应详情

Step 1-Quinazolin-4-yl-piperidine-4-carbonyl chloride hydrochloride (197 mg, 0.63 mmol) was added to a solution of [2-(4-chlorobenzylamino)-ethyl]-carbamic acid tert-butyl ester (180 mg, 0.63 mmol) and DMAP (154 mg, 1.26 mmol) in DCM (6.5 mL) cooled in an ice bath. After being stirred for 12 hours, the mixture was partitioned between DCM (50 mL) and H2O (80 mL) containing 1 mL of 1.0 M HCl. The DCM layer was drained off and the acidic aqueous layer was extracted 3 more times with DCM. The combined DCM extracts were dried (Na2SO4), filtered, and concentrated in vacuo. The crude material was chromatographed (SiO2) using EtOAc as eluent to give {2-[(4-chlorobenzyl)-(1-quinazolin-4-yl-piperidine-4-carbonyl)-amino]-ethyl}-carbamic acid tert-butyl ester (190 mg).

1. temperaturecooled in an ice bath
2. customthe mixture was partitioned between DCM (50 mL) and H2O (80 mL)
3. additioncontaining 1 mL of 1.0 M HCl
4. extractionthe acidic aqueous layer was extracted 3 more times with DCM
5. dry with materialThe combined DCM extracts were dried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe crude material was chromatographed (SiO2)