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N-Hydroxyphthalimide → N-[4-(tert-butyldimethylsilyloxy)benzyloxy]phthalimide

HRID 584390
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 584390
N(C(OCC)=O)=NC(OCC)=O.[Si:13]([O:20][C:21]1[CH:28]=[CH:27][C:24]([CH2:25][OH:26])=[CH:23][CH:22]=1)([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14].O[N:30]1[C:34](=[O:35])[C:33]2=[CH:36][CH:37]=[CH:38][CH:39]=[C:32]2[C:31]1=[O:40].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCCC1.C(OCC)(=O)C.CCCCCC.C1(C)C=CC=CC=1>[Si:13]([O:20][C:21]1[CH:28]=[CH:27][C:24]([CH2:25][O:26][N:30]2[C:31](=[O:40])[C:32]3=[CH:39][CH:38]=[CH:37][CH:36]=[C:33]3[C:34]2=[O:35])=[CH:23][CH:22]=1)([C:16]([CH3:19])([CH3:18])[CH3:17])([CH3:15])[CH3:14]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 10665N-HydroxyphthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 10014460(4-((Tert-butyldimethylsilyl)oxy)phenyl)methanol

Produkt 1

HCID 11825150N-[4-(tert-butyldimethylsilyloxy)benzyloxy]phthalimideAusbeute 44,1 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028TetrahydrofuranLösungsmittelHCID 22262317Ethyl acetate hexane tolueneLösungsmittel

Versuchsvorschrift

Diethyl azodicarboxylate (40% toluene solution, 54.0 g) was added dropwise to a solution of 4-(tert-butyldimethylsilyloxy)benzylalcohol (27.5 g), N-hydroxyphthalimide (16.8 g) and triphenylphosphine (31.1 g) in tetrahydrofuran (450 ml) at room temperature and stirred for 18 hours. After the reaction mixture was concentrated, diisopropyl ether (200 ml) was added and the residual crystals were removed by filtration. The filtrate was concentrated, and the residue was subjected to silica gel chromatography to obtain N-[4-(tert-butyldimethylsilyloxy)benzyloxy]phthalimide (17.4 g, yield 43%) as crystals from an ethyl acetate-hexane-toluene (1:10:10, v/v)-eluted fraction. The crystals were recrystallized from ethyl acetate-hexane to obtain colorless crystals. m.p. 76-77° C.

Aufarbeitung

  1. concentrationAfter the reaction mixture was concentrated
  2. additiondiisopropyl ether (200 ml) was added
  3. customthe residual crystals were removed by filtration
  4. concentrationThe filtrate was concentrated

Quellen und Nachweise

ORD-Eintrag
ord-458065fe40b9472b9ca7dd1004023bbc
Quelldatensatz
uspto-grants-2005_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06924300B2

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