Hydrochloric Acid → S-[4-(9-Fluorenylmethoxy)-4-oxobutyl]-L-cysteine

The title compound of example 1 (3.0 g, 8.72 mmol) was added to a solution of L-cysteine (1.0 g, 8.26 mmol) and DIEA (4.4 mL, 24.7 mmol) in EtOH-H2O (1:1, 100 mL). The resulting heterogeneous mixture was stirred vigorously at room temperature (20°-22° C.) for 18 h. The mixture was rendered acidic by the addition of 1N HCl (ph=6). The solid in the reaction mixture was collected on a filter and washed with H2O and EtOH. A suspension of the solid in EtOH (70 mL) was heated with stirring then allowed to cool. The solid in the suspension was collected on a filter, washed with EtOH, Et2O and dried to give the title compound (1.2 g).

1. customThe solid in the reaction mixture was collected on
2. filtrationa filter
3. washwashed with H2O and EtOH
4. additionA suspension of the solid in EtOH (70 mL)
5. temperaturewas heated
6. stirringwith stirring
7. temperatureto cool
8. customThe solid in the suspension was collected on a filter
9. washwashed with EtOH, Et2O
10. customdried

ORD-Eintrag

ord-adce63b78ad74900b8368867dc397e00

Quelldatensatz

uspto-grants-1990_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04891358