Benzenebutanoic acid, alpha-bromo-, ethyl ester → t-Butyl alpha-{6(R)-[1-ethoxycarbonyl-3-phenylpropylamino]-5-oxo-3(S)-(2-thienyl)perhydro-1,4-thiazepin-4-yl}acetate

HRID 256023Notes

Reaction equation

HRID 256023 reaction equation
[NH2:1][C@H:2]1[CH2:8][S:7][CH2:6][C@@H:5]([C:9]2[S:10][CH:11]=[CH:12][CH:13]=2)[N:4]([CH2:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[C:3]1=[O:22].Br[CH:24]([CH2:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)[C:25]([O:27][CH2:28][CH3:29])=[O:26]>C(OCC)(=O)C.C(Cl)Cl>[CH2:28]([O:27][C:25]([CH:24]([NH:1][C@H:2]1[CH2:8][S:7][CH2:6][C@@H:5]([C:9]2[S:10][CH:11]=[CH:12][CH:13]=2)[N:4]([CH2:14][C:15]([O:17][C:18]([CH3:19])([CH3:21])[CH3:20])=[O:16])[C:3]1=[O:22])[CH2:30][CH2:31][C:32]1[CH:33]=[CH:34][CH:35]=[CH:36][CH:37]=1)=[O:26])[CH3:29]

Participants

5

Reactant 2

HCID 11747666Benzenebutanoic acid, alpha-bromo-, ethyl esterHCID 13877951t-butyl alpha-[6(R)-amino-5-oxo-3(S)-(2-thienyl)perhydro-1,4-thiazepin-4-yl]acetate

Product 1

HCID 53995810t-Butyl alpha-{6(R)-[1-ethoxycarbonyl-3-phenylpropylamino]-5-oxo-3(S)-(2-thienyl)perhydro-1,4-thiazepin-4-yl}acetate

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

344 mg of t-butyl α-[6(R)-amino-5-oxo-3(S)-(2-thienyl)perhydro-1,4-thiazepin-4-yl]acetate [prepared as described in step (g) above] were subjected to N-alkylation with 406 mg of ethyl 2-bromo-4-phenylbutyrate in the manner described in Example 1(h). The reaction product was subjected to silica gel column chromatography using a 1:20 by volume mixture of ethyl acetate and methylene chloride as eluent, which separated the compound into two isomers, A and B, (ascribed to the asymmetric carbon atom to which the phenethyl group is attached). Isomer A (in which the carbon attached to the phenethyl group had the R-configuration) was eluted first as an oily compound in a yield of 0.17 g.

Workup

  1. customwhich separated the compound into two isomers
  2. washwas eluted first as an oily compound in a yield of 0.17 g

Sources & evidence

ORD record
ord-5e84d33d684e49e08086ae6dd36f43bc
Source dataset
uspto-grants-1987_10
Patent number
US04699905

Reaction notes

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