Water → N-(2,6-dichlorothiobenzoyl)-4-(2,6-dimethoxyphenyl)-L-phenylalanine methyl ester

HRID 1060451Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:33])[C@H:4]([CH2:16][C:17]1[CH:22]=[CH:21][C:20]([C:23]2[C:28]([O:29][CH3:30])=[CH:27][CH:26]=[CH:25][C:24]=2[O:31][CH3:32])=[CH:19][CH:18]=1)[NH:5][C:6](=O)[C:7]1[C:12]([Cl:13])=[CH:11][CH:10]=[CH:9][C:8]=1[Cl:14].COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:43])=CC=1.O>C1(C)C(C)=CC=CC=1>[CH3:1][O:2][C:3](=[O:33])[C@H:4]([CH2:16][C:17]1[CH:22]=[CH:21][C:20]([C:23]2[C:28]([O:29][CH3:30])=[CH:27][CH:26]=[CH:25][C:24]=2[O:31][CH3:32])=[CH:19][CH:18]=1)[NH:5][C:6](=[S:43])[C:7]1[C:12]([Cl:13])=[CH:11][CH:10]=[CH:9][C:8]=1[Cl:14]

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of N-(2,6-dichlorobenzoyl)-4-(2,6-dimethoxyphenyl)-L-phenylalanine methyl ester (0.25 g) and Lawesson's reagent (2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disufide; 0.21 g) in xylene (10 mL) was refluxed overnight. The mixture was cooled to about 50° C. and water (15 mL) was added and refluxed for 2 h. The mixture was stirred at room temperature overnight and evaporated. The residue was partitioned between EtOAc and water. The EtOAc layer was washed with water, dried and evaporated to yield 0.25 g of N-(2,6-dichlorothiobenzoyl)-4-(2,6-dimethoxyphenyl)-L-phenylalanine methyl ester. ESMS: m/z 504 (MH+).

Workup

temperaturewas refluxed overnight
temperaturerefluxed for 2 h
customevaporated
customThe residue was partitioned between EtOAc and water
washThe EtOAc layer was washed with water
customdried
customevaporated

Sources & evidence

ORD record: ord-7de441e2f4e4496995ce386bfe18e317
Source dataset: uspto-grants-2003_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06521666B1

Reaction notes

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