Triethylamine → (S)-4-[2-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-ethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid benzyl ester

HRID 655548Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 655548
[CH2:1]([O:8][C:9]([N:11]1[C@@H:15]([CH2:16][CH:17]=O)[CH2:14][O:13][C:12]1([CH3:20])[CH3:19])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[CH2:22]1[C:24]2([CH2:29][CH2:28][NH:27][CH2:26][C@H:25]2[OH:30])[CH2:23]1.C(N(CC)CC)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl>[CH2:1]([O:8][C:9]([N:11]1[C@@H:15]([CH2:16][CH2:17][N:27]2[CH2:28][CH2:29][C:24]3([CH2:22][CH2:23]3)[C@H:25]([OH:30])[CH2:26]2)[CH2:14][O:13][C:12]1([CH3:20])[CH3:19])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 5049666Sodium triacetoxyborohydrideHCID 44541812(4S)-6-Azaspiro[2.5]octan-4-ol hydrochloride2×HCID 60018412(S)-2,2-Dimethyl-4-(2-oxo-ethyl)-oxazolidine-3-carboxylic acid benzyl ester

Produkt 1

HCID 67080106(S)-4-[2-((S)-4-hydroxy-6-aza-spiro[2.5]oct-6-yl)-ethyl]-2,2-dimethyl-oxazolidine-3-carboxylic acid benzyl esterAusbeute 97,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a solution of (S)-2,2-dimethyl-4-(2-oxo-ethyl)-oxazolidine-3-carboxylic acid benzyl ester (8.51 g, 30.7 mmol) in dichloromethane (140 mL) were added (S)-6-aza-spiro[2.5]octan-4-ol hydrochloride (intermediate 2; 5.03 g, 30.7 mmol), triethylamine (3.11 g, 30.7 mmol) and sodium triacetoxyborohydride (9.11 g, 43.0 mmol) at room temperature. After 1 h the reaction mixture was partitioned between sat. aq. sodium hydrogencarbonate solution and dichloromethane. The aqueous layer was extracted twice with dichloromethane, the combined organic phases were dried (MgSO4), filtered, and evaporated to afford the title compound (11.6 g, 97%). Light yellow gum, MS (ISP)=389.3 (M+H)+.

Aufarbeitung

  1. customAfter 1 h the reaction mixture was partitioned between sat. aq. sodium hydrogencarbonate solution and dichloromethane
  2. extractionThe aqueous layer was extracted twice with dichloromethane
  3. dry with materialthe combined organic phases were dried (MgSO4)
  4. filtrationfiltered
  5. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-02fe066b98094a538eb5ff5f7943d634
Quelldatensatz
uspto-grants-2011_12
Patentnummer
US08071586B2

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