Lawesson's reagent → HCID 57476016, compound

HRID 1851597Notes

Reaction equation

[CH2:1]([N:3]([S:17]([C:20]1[S:21][CH:22]=[CH:23][CH:24]=1)(=[O:19])=[O:18])[C:4]1[CH:5]=[CH:6][C:7]([CH3:16])=[C:8]2[C:12]=1[NH:11][C:10]([C:13]([NH2:15])=O)=[CH:9]2)[CH3:2].COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:34])=CC=1>O1CCCC1>[CH2:1]([N:3]([S:17]([C:20]1[S:21][CH:22]=[CH:23][CH:24]=1)(=[O:19])=[O:18])[C:4]1[CH:5]=[CH:6][C:7]([CH3:16])=[C:8]2[C:12]=1[NH:11][C:10]([C:13](=[S:34])[NH2:15])=[CH:9]2)[CH3:2]

Participants

Conditions

Temperature: 40 °C

Procedure

A mixture of 7-[ethyl(2-thienylsulfonyl)amino]-4-methyl-1H-indole-2-carboxamide (1.9 g), Lawesson's reagent (2.1 g) and tetrahydrofuran (100 mL) was stirred at 40° C. for 4 hr. The reaction solution was concentrated under reduced pressure. The obtained oil was crystallized from dichloromethane-toluene and washed with toluene to give 7-[ethyl(2-thienylsulfonyl)amino]-4-methyl-1H-indole-2-carbothioamide (2.0 g, yield:quantitative) as pale-yellow crystals. A mixed solution of the obtained crystals (2.0 g), bromomalonaldehyde (2.4 g) and N,N-dimethylacetamide (50 mL) was stirred at 70° C. for 3 hr. The reaction solution was diluted with ethyl acetate, washed successively with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained oil was crystallized from dichloromethane-toluene to give the title compound (1.6 g, yield 70%) as pale-yellow crystals.

Workup

concentrationThe reaction solution was concentrated under reduced pressure
customThe obtained oil was crystallized from dichloromethane-toluene
washwashed with toluene

Sources & evidence

ORD record: ord-54d77a02236049c29d86fbd3ee27eb23
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08957070B2

Reaction notes

Loading…