p-Toluenesulfonic acid → HCID 178513886, compound

HRID 1657255Notes

Reaction equation

HRID 1657255 reaction equation
C(S(C[C@@H](CC1C=CC=CC=1)C(N[C@@H:13]([CH2:32][C:33]1[N:34]=[CH:35][NH:36][CH:37]=1)[C:14]([NH:16][C@@H](CC1CCCCC1)[C@@H](O)[C@@H](O)C(C)C)=[O:15])=O)(=O)=O)(C)(C)C.C1(C)C=CC(S(O)(=O)=O)=CC=1>CC(C)(C)C=O.C(Cl)Cl.CCOCC>[NH:36]1[CH:37]=[C:33]([CH2:32][CH2:13][C:14]([NH2:16])=[O:15])[N:34]=[CH:35]1

Participants

6

Reactant 2

HCID 6101p-Toluenesulfonic acidHCID 178448391HCID 178448391, compound

Product 1

HCID 178513886HCID 178513886, compound

Reagents, catalysts & solvents 3

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolventHCID 12417PivalaldehydeSolvent

Procedure

130 mg of (S)-α-[(S)-α-[(t-butylsulphonyl)methyl]hydrocinnamamido]-N-[(1S,2R,3S)-1-(cyclohexylmethyl)-2,3-dihydroxy-4-methylpentyl]imidazole-4-propionamide and 130 mg of p-toluenesulphonic acid in 1 ml of trimethylacetaldehyde and 10 ml of methylene chloride are left to stand at room temperature for 24 hours. Thereafter, the reaction mixture is taken up in ether and the organic phase is washed in succession with 2N sodium bicarbonate solution and water, dried and evaporated. Chromatography of the residue on 30 g of silica gel using a 200:10:1 mixture of methylene chloride, methanol and ammonia yields (S)-N-[(S)-1-[(2R or S,4R,5S)-2-t-butyl-5-isopropyl-1,3-dioxolan-4-yl]-2-cyclohexylethyl]-α-[(t-butylsulphonyl)methyl]hydrocinnamamido]imidazole-4-propionamide as a foam, MS: 701 (M+H)+.

Workup

  1. washthe organic phase is washed in succession with 2N sodium bicarbonate solution and water
  2. customdried
  3. customevaporated
  4. additionChromatography of the residue on 30 g of silica gel using a 200:10:1 mixture of methylene chloride, methanol and ammonia

Sources & evidence

ORD record
ord-12cd521f5fe4444c939e88cd58f98f9f
Source dataset
uspto-grants-1993_10
Patent number
US05256645

Reaction notes

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