Diisopropylethylamine → N-methyl-N-((3E)-1,1-dimethyl-4-(N-methyl-N-((1R)-1-(N-methyl-N-(2-(2-thienyl)ethyl)carbamoyl)-2-(2-naphthyl)ethyl)carbamoyl)but-3-enyl)carbamic acid tert-butyl ester

HRID 582408Notes

Reaction equation

HRID 582408 reaction equation
[C:1]([O:5][C:6]([N:8]([C:10]([CH3:18])([CH3:17])[CH2:11]/[CH:12]=[CH:13]/[C:14]([OH:16])=O)[CH3:9])=[O:7])([CH3:4])([CH3:3])[CH3:2].ON1C2N=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.[CH3:41][N:42]([CH2:59][CH2:60][C:61]1[S:62][CH:63]=[CH:64][CH:65]=1)[C:43](=[O:58])[C@H:44]([NH:56][CH3:57])[CH2:45][C:46]1[CH:55]=[CH:54][C:53]2[C:48](=[CH:49][CH:50]=[CH:51][CH:52]=2)[CH:47]=1.C(N(C(C)C)C(C)C)C>ClCCl.CN(C)C=O.C(OCC)(=O)C>[C:1]([O:5][C:6](=[O:7])[N:8]([CH3:9])[C:10]([CH3:18])([CH3:17])[CH2:11]/[CH:12]=[CH:13]/[C:14](=[O:16])[N:56]([CH3:57])[C@@H:44]([C:43](=[O:58])[N:42]([CH3:41])[CH2:59][CH2:60][C:61]1[S:62][CH:63]=[CH:64][CH:65]=1)[CH2:45][C:46]1[CH:55]=[CH:54][C:53]2[C:48](=[CH:49][CH:50]=[CH:51][CH:52]=2)[CH:47]=1)([CH3:2])([CH3:3])[CH3:4]

Participants

9

Reactant 5

HCID 81531DiisopropylethylamineHCID 181649HOAtHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 10831847(2R)-N-methyl-2-(methylamino)3-(2-naphthyl)-N-(2-(2-thienyl)ethyl)propionamideHCID 10848750(2E)-5-(N-(tert-butoxycarbonyl)-N-methylamino)-5-methylhex-2-enoic acid

Product 1

HCID 59965079N-methyl-N-((3E)-1,1-dimethyl-4-(N-methyl-N-((1R)-1-(N-methyl-N-(2-(2-thienyl)ethyl)carbamoyl)-2-(2-naphthyl)ethyl)carbamoyl)but-3-enyl)carbamic acid tert-butyl esterYield 80%

Reagents, catalysts & solvents 3

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent2×HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

##STR115## (2E)-5-(N-(tert-Butoxycarbonyl)-N-methylamino)-5-methylhex-2-enoic acid (146 mg, 0.57 mmol) was dissolved in dichloromethane (2 ml) and N,N-dimethylformamide (2 ml). 1-Hydroxy-7-azabenzotriazole (72 mg, 0.57 mmol) was added as a solid. The solution was cooled to 0° C. N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (109 mg, 0.57 mmol) was added. The solution was stirred for 15 min at 0° C. A solution of (2R)-N-Methyl-2-(methylamino)-3-(2-naphthyl)-N-(2-(2-thienyl)ethyl)propionamide (200 mg, 0.57 mmol) in dichloromethane (2 ml) was added. Ethyldiisopropylamine (0.1 ml, 0.57 mmol) was added. The reaction mixture was stirred for 16 h, while it was warming up to room temperature. It was diluted with ethyl acetate (50 ml) and washed with 1N hydrochoric acid. The aqueous phase was extracted with ethyl acetate (2×20 ml). The combined organic layers were washed with saturated sodium hydrogen carbonate solution (40 ml) and dried over magnesium sulfate. The solvent was removed in vacuo. The crude product was purified by flash chromatography on silica (80 g), using ethyl acetate/heptane as eluent, to give 270 mg of N-methyl-N-((3E)-1,1-dimethyl-4-(N-methyl-N-((1R)-1-(N-methyl-N-(2-(2-thienyl)ethyl)carbamoyl)-2-(2-naphthyl)ethyl)carbamoyl)but-3-enyl)carbamic acid tert-butyl ester.

Workup

  1. stirringThe reaction mixture was stirred for 16 h, while it
  2. temperaturewas warming up to room temperature
  3. washwashed with 1N hydrochoric acid
  4. extractionThe aqueous phase was extracted with ethyl acetate (2×20 ml)
  5. washThe combined organic layers were washed with saturated sodium hydrogen carbonate solution (40 ml)
  6. dry with materialdried over magnesium sulfate
  7. customThe solvent was removed in vacuo
  8. customThe crude product was purified by flash chromatography on silica (80 g)

Sources & evidence

ORD record
ord-4fb79b9b51b248a1a9bfdef3fa9b10e0
Source dataset
uspto-grants-1999_07
Patent number
US05922770

Reaction notes

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