Formaldehyde → (S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-1-methyl-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester 7-methyl ester

HRID 391859

Reaktionsgleichung

Reaktionsgleichung von HRID 391859
[CH3:1][O:2][C:3]([CH:5]1[CH2:18][C:17]2[CH:16]=[C:15]3[C:10]([O:11][C@@H:12]([C:19]4[CH:24]=[CH:23][C:22]([O:25][CH2:26][C:27]5[CH:32]=[CH:31][C:30]([Cl:33])=[C:29]([Cl:34])[CH:28]=5)=[CH:21][CH:20]=4)[CH2:13][NH:14]3)=[CH:9][C:8]=2[CH2:7][N:6]1[C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])=[O:4].C=O.[C:44](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(Cl)Cl>C1COCC1.ClCCCl>[CH3:1][O:2][C:3]([CH:5]1[CH2:18][C:17]2[CH:16]=[C:15]3[C:10]([O:11][C@@H:12]([C:19]4[CH:24]=[CH:23][C:22]([O:25][CH2:26][C:27]5[CH:32]=[CH:31][C:30]([Cl:33])=[C:29]([Cl:34])[CH:28]=5)=[CH:21][CH:20]=4)[CH2:13][N:14]3[CH3:44])=[CH:9][C:8]=2[CH2:7][N:6]1[C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])=[O:4]

Komponenten

6

Edukt 4

HCID 712FormaldehydeHCID 6344DichloromethaneHCID 5049666Sodium triacetoxyborohydrideHCID 66719396(S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester 7-methyl ester

Produkt 1

HCID 66719521(S)-3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-1-methyl-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester 7-methyl esterAusbeute 90,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 21493386Dce thfLösungsmittel

Versuchsvorschrift

To a solution of (S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester 7-methyl ester (298 mg) in THF/DCE (30 mL, 2:1) was added paraformaldehyde (90 mg, 4 eq.) and sodium triacetoxy-borohydride (208 mg) and the mixture stirred 4 hours. DCM was added to the mixture and the organic washed with 10% Na2CO3 solution and brine. The organic was dried over sodium sulfate and the solvent removed under reduced pressure to afford the crude amine. The residue was purified by flash chromatography (hexanes/ethyl acetate from 80:20 to 60:40) to provide the product (277 mg).

Aufarbeitung

  1. washthe organic washed with 10% Na2CO3 solution and brine
  2. dry with materialThe organic was dried over sodium sulfate
  3. customthe solvent removed under reduced pressure
  4. customto afford the crude amine
  5. customThe residue was purified by flash chromatography (hexanes/ethyl acetate from 80:20 to 60:40)

Quellen und Nachweise

ORD-Eintrag
ord-5081721ca0984d6580d6d7517f51df6e
Quelldatensatz
uspto-grants-2013_02
Patentnummer
US08383644B2

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