Lawesson's reagent → Ethyl 6'-bromo-4-methoxy-1'-(2-(trimethylsilyl)ethylsulfonamido)-1',3'-dihydrospiro[cyclohexane-1,2'-indene]-1'-carboxylate

HRID 1503460Notes

Reaction equation

HRID 1503460 reaction equation
[Br:1][C:2]1[CH:10]=[C:9]2[C:5]([CH2:6][C:7]3([CH2:30][CH2:29][CH:28]([O:31][CH3:32])[CH2:27][CH2:26]3)[C:8]2([NH:16][S:17]([CH2:20][CH2:21][Si:22]([CH3:25])([CH3:24])[CH3:23])(=[O:19])=[O:18])[C:11]([O:13][CH2:14][CH3:15])=C)=[CH:4][CH:3]=1.C[O:34]C1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=S)=CC=1>C1(C)C=CC=CC=1>[Br:1][C:2]1[CH:10]=[C:9]2[C:5]([CH2:6][C:7]3([CH2:30][CH2:29][CH:28]([O:31][CH3:32])[CH2:27][CH2:26]3)[C:8]2([NH:16][S:17]([CH2:20][CH2:21][Si:22]([CH3:25])([CH3:24])[CH3:23])(=[O:18])=[O:19])[C:11]([O:13][CH2:14][CH3:15])=[O:34])=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 87949Lawesson's reagentHCID 67043662N-(6'-bromo-1'-(1-ethoxyvinyl)-4-methoxy-1',3'-dihydrospiro[cyclohexane-1,2'-indene]-1'-yl)-2-(trimethylsilyl)ethanesulfonamide

Product 1

HCID 67043624Ethyl 6'-bromo-4-methoxy-1'-(2-(trimethylsilyl)ethylsulfonamido)-1',3'-dihydrospiro[cyclohexane-1,2'-indene]-1'-carboxylateYield 73%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

To a solution of compound 9 (40 mg, 0.090 mmol) in anhydrous toluene (5 mL) was added Lawesson's reagent (40 mg, 0.099 mmol) under a nitrogen atmosphere, the mixture was heated at reflux for 12 h. After cooling down, the solvent was removed by evaporation in vacuo and the resulting residue was purified by column chromatography on silica gel (petroleum ether: EtOAc=3:1) to give compound 10 (30 mg, 73%) as a white solid. LC-MS tR=1.420 min in 2 min chromatography, MS (ESI) m/z 459.1 [M+H]+.

Workup

  1. temperaturethe mixture was heated
  2. temperatureat reflux for 12 h
  3. temperatureAfter cooling down
  4. customthe solvent was removed by evaporation in vacuo
  5. customthe resulting residue was purified by column chromatography on silica gel (petroleum ether: EtOAc=3:1)

Sources & evidence

ORD record
ord-bcc7c19801a04ae08df6149fdb763905
Source dataset
uspto-grants-2015_12
Patent number
US09212153B2

Reaction notes

Loading…