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

HRID 600822Notes

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 solution of 1-benzyl-3-(5-cyano-2-ethylaminophenyl)thiourea (1.0 g, 3.2 mmol) in ethanol (40 mL, anhyd) was added ethyl chloroacetate (0.39 g, 3.2 mmol) and then DBU (0.58 g, 3.8 mmol). The reaction mixture was heated at 80° C. with stirring. After 1 h the reaction mixture was cooled, 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 (2K, m), 1.03 (3H, t).

Workup

temperatureAfter 1 h the reaction mixture was cooled
concentrationconcentrated under reduced pressure
customchromatographed (silica gel, 1:1 EtOAc/Hex)

Sources & evidence

ORD record: ord-c6e19151a97d482c852c0612aa887304
Source dataset: uspto-grants-2011_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07902237B2

Reaction notes

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