Hydrochloric Acid → HCID 59432811, Verbindung

HRID 507318Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 507318
[NH2:1][CH:2]([CH2:8][C:9]([CH3:11])=[CH2:10])[C:3]([O:5][CH2:6][CH3:7])=[O:4].[Cl:12][C:13]1[CH:18]=[CH:17][C:16]([S:19](Cl)(=[O:21])=[O:20])=[CH:15][CH:14]=1.CCN(CC)CC.Cl>C(Cl)Cl>[Cl:12][C:13]1[CH:18]=[CH:17][C:16]([S:19]([NH:1][CH:2]([CH2:8][C:9]([CH3:11])=[CH2:10])[C:3]([O:5][CH2:6][CH3:7])=[O:4])(=[O:21])=[O:20])=[CH:15][CH:14]=1

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 73984-Chlorobenzenesulfonyl chlorideHCID 8471TriethylamineHCID 14163092HCID 14163092, Verbindung

Produkt 1

HCID 59432811HCID 59432811, VerbindungAusbeute 50,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A solution of ethyl 2-amino-4-methyl-4-pentenoate (2.84 g, 18.1 mmol, prepared as in Reaction Scheme 19 from (benzhydrylideneamino)acetic acid ethyl ester and 1-bromo-2-methyl-2-propene) in CH2Cl2 (250 mL) was reacted with 4-chlorobenzenesulfonyl chloride (4.20 g, 19.9 mmol) and Et3N (3.78 mL, 27.2 mmol). After 4 h, the resulting mixture was poured into 1 N aqueous HCl (500 mL) and extracted with EtOAc (3×150 mL). The organic layer was washed with brine (50 mL), dried (MgSO4), filtered, and concentrated in vacuo. The crude concentrate was purified using silica gel column chromatography (10:1 to 5:1 gradient, hexanes/EtOAc) to afford 3.04 g (25% yield over 3 steps) of ethyl 2-(4-chlorobenzenesulfonylamino)-4-methyl-4-pentenoate: LCMS (M+Na)+ 354.2; 1H NMR (400 MHz, CDCl3) 7.77 (d, 2H, J=9.1), 7.46 (d, 2H, J=8.8), 5.07 (d, 1H, J=9.0), 4.84 (s, 1H), 4.73 (s, 1H), 4.05 (m, 1H), 3.95 (q, 2H, J=7.1), 2.40 (m, 2H), 1.66 (s, 3H), 1.13 (t, 3H, J=7.1).

Aufarbeitung

  1. extractionextracted with EtOAc (3×150 mL)
  2. washThe organic layer was washed with brine (50 mL)
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. concentrationThe crude concentrate
  7. customwas purified

Quellen und Nachweise

ORD-Eintrag
ord-e5e5d0edf8bb4ba8b511ad18aaee22cc
Quelldatensatz
uspto-grants-2010_08
Patentnummer
US07786122B2

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