1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → 2-(2-Benzothienyl)-3-oxa-1-azaspiro[4.5]dec-1-en-4-one
Reaction equation
Cl.C(N=C=NCCCN(C)C)C.[S:13]1[C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][C:16]=2[CH:15]=[C:14]1[C:22]([NH:24][C:25]1([C:31]([OH:33])=[O:32])[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]1)=O>C(Cl)Cl>[S:13]1[C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][C:16]=2[CH:15]=[C:14]1[C:22]1[O:33][C:31](=[O:32])[C:25]2([CH2:26][CH2:27][CH2:28][CH2:29][CH2:30]2)[N:24]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
4.1 g (21 mmol) of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride was added to a solution of 5 g (16 mmol) of 1-[(2-benzothienylcarbonyl)amino]cyclohexanecarboxylic acid in 50 ml of methylene chloride. After the mixture was stirred at room temperature for 4 hours, the reaction solution was concentrated under reduced pressure, ethyl acetate was added thereto, and the mixture was successively washed with water, a 10% aqueous potassium hydrogensulfate solution, a saturated aqueous sodium hydrogencarbonate solution and saturated brine. The organic layer was dried with anhydrous sodium sulfate and the solvent was distilled off under reduced pressure to obtain 3.5 g (75%) of the title compound.