Ethyl chloroacetate → 3-(3-Benzyl-4-oxothiazolidin-2-ylideneamino)-4-ethylaminobenzonitrile

HRID 1241954Notes

Reaction equation

[CH2:1]([NH:8][C:9]([NH:11][C:12]1[CH:17]=[C:16]([C:18]#[N:19])[CH:15]=[CH:14][C:13]=1[NH:20][CH2:21][CH3:22])=[S:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl[CH2:24][C:25](OCC)=[O:26].C1CCN2C(=NCCC2)CC1>C(O)C>[CH2:1]([N:8]1[C:25](=[O:26])[CH2:24][S:10][C:9]1=[N:11][C:12]1[CH:17]=[C:16]([CH:15]=[CH:14][C:13]=1[NH:20][CH2:21][CH3:22])[C:18]#[N:19])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a 100 mL flask was added 1-benzyl-3-(5-cyano-2-ethylaminophenyl)thiourea (1.0 g, 3.2 mmol), anhydrous ethanol (40 mL), ethyl chloroacetate (0.39 g, 3.2 mmol) and then DBU (0.58 g, 3.8 mmol). The reaction was heated at 80° C. for 30 min. After cooling to room temperature, the reaction mixture was concentrated under reduced pressure and chromatographed (silica gel, 1:1 EtOAc/Hex) to afford the title product (0.98 g, 87%). 1H-NMR (CDCl3): δ 7.38 (6H, m), 7.11 (1H, d), 6.50 (1H, d), 5.05 (2H, s), 3.96 (2H, s), 3.01 (2H, m), 1.03 (3H, t).

Workup

temperatureAfter cooling to room temperature
concentrationthe reaction mixture was concentrated under reduced pressure
customchromatographed (silica gel, 1:1 EtOAc/Hex)

Sources & evidence

ORD record: ord-ab0a2c0f406a433886697aa810315c77
Source dataset: uspto-grants-2006_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07115640B2

Reaction notes

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