Potassium Hydroxide → (+)-cis-2-(4-methoxyphenyl)-3-hydroxy-5-[2-(dimethylamino)ethyl]-7,8-dimethyl-2,3-dihydro-1,5-benzothiazepin-4(5H)-one

HRID 280520Notes

Reaction equation

HRID 280520 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C@H:9]2[C@@H:15]([OH:16])[C:14](=[O:17])[NH:13][C:12]3[CH:18]=[C:19]([CH3:23])[C:20]([CH3:22])=[CH:21][C:11]=3[S:10]2)=[CH:5][CH:4]=1.[OH-].[K+].Cl.[CH3:27][N:28]([CH3:32])[CH2:29][CH2:30]Cl>CS(C)=O>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C@H:9]2[C@@H:15]([OH:16])[C:14](=[O:17])[N:13]([CH2:30][CH2:29][N:28]([CH3:32])[CH3:27])[C:12]3[CH:18]=[C:19]([CH3:23])[C:20]([CH3:22])=[CH:21][C:11]=3[S:10]2)=[CH:5][CH:4]=1

Participants

5

Reactant 3

HCID 14797Potassium HydroxideHCID 11636816N,N-Dimethylaminoethyl chloride hydrochlorideHCID 70409347(+)-cis-2-(4-methoxyphenyl)-3-hydroxy-7,8-dimethyl-2,3-dihydro-1,5-benzothiazepin-4(5H)-one

Product 1

HCID 10834852(+)-cis-2-(4-methoxyphenyl)-3-hydroxy-5-[2-(dimethylamino)ethyl]-7,8-dimethyl-2,3-dihydro-1,5-benzothiazepin-4(5H)-oneYield 64.2%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

A mixture of 8.2 g of (±)-cis-2-(4-methoxyphenyl)-3-hydroxy-7,8-dimethyl-2,3-dihydro-1,5-benzothiazepin-4(5H)-one, 3.1 g of potassium hydroxide and 100 ml of dimethylsulfoxide is stirred at room temperature for 30 minutes. Then, 4 g of 2-(dimethylamino)ethyl chloride hydrochloride are added to the mixture, and said mixture is stirred at room temperature for 20 hours. After the reaction is completed, the mixture is poured into ice-water. The aqueous mixture is extracted with ethyl acetate, and the ethyl acetate layer is further extracted with 20% hydrochloric acid. The hydrochloric acid layer is alkalized with conc. aqueous ammonia, and the precipitated crystals are collected by filtration, washed with water and then dried. 6.4 g of (±)-cis-2-(4-methoxyphenyl)-3-hydroxy-5-[2-(dimethylamino)ethyl]-7,8-dimethyl-2,3-dihydro-1,5-benzothiazepin-4(5H)-one are obtained.

Workup

  1. stirringis stirred at room temperature for 20 hours
  2. extractionThe aqueous mixture is extracted with ethyl acetate
  3. extractionthe ethyl acetate layer is further extracted with 20% hydrochloric acid
  4. filtrationthe precipitated crystals are collected by filtration
  5. washwashed with water
  6. customdried

Sources & evidence

ORD record
ord-99344d0b439f43d9b142bc9740656bf7
Source dataset
uspto-grants-1986_05
Patent number
US04590188

Reaction notes

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