Triethylamine → [4-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzyloxy]-acetic acid tert-butyl ester

HRID 2216211Notizen

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Reaktionsgleichung von HRID 2216211
[C:1]([O:5][C:6](=[O:18])[CH2:7][O:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[C:12](I)[CH:11]=1)([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.[CH3:26][C:27]1([CH3:34])[C:31]([CH3:33])([CH3:32])[O:30][BH:29][O:28]1>O1CCOCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[C:1]([O:5][C:6](=[O:18])[CH2:7][O:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[C:12]([B:29]2[O:30][C:31]([CH3:33])([CH3:32])[C:27]([CH3:34])([CH3:26])[O:28]2)[CH:11]=1)([CH3:4])([CH3:3])[CH3:2]

Komponenten

6

Edukt 3

HCID 8471TriethylamineHCID 27347684,4,5,5-Tetramethyl[1,3,2]dioxaborolaneHCID 69586267(3-Iodo-4-methyl-benzyloxy)-acetic acid tert-butyl ester

Produkt 1

HCID 69586766[4-Methyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzyloxy]-acetic acid tert-butyl ester

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418476HCID 178418476, VerbindungKatalysatorHCID 312751,4-DioxaneLösungsmittel

Versuchsvorschrift

The procedure used in Example 3: step b was followed using (3-iodo-4-methyl-benzyloxy)-acetic acid tert-butyl ester ((Example 300: step a) 600 mg, 1.65 mmol), PdCl2(PPh3)2 (58 mg, 0.08 mmol), triethylamine (1.25 mL, 9.4 mmol), and 4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (0.91 mL, 6.4 mmol) in dioxane (5 mL). Analogous aqueous workup and purification by SiO2 flash column chromatography yielded the title compound contaminated with the product resulting from halide reduction (569 mg, 95%). The material was used without further purification. 1H-NMR (CDCl3): δ 7.73 (d, 1H, J=1.9 Hz), 7.38 (dd, 1H, J=2.1, 7.9 Hz), 7.18 (d, 1H, J=7.9 Hz), 4.61 (s, 2H), 3.97 (s, 2H), 2.55 (s, 3H), 1.50 (s, 9H), 1.37 (s, 9H).

Aufarbeitung

  1. customAnalogous aqueous workup and purification by SiO2 flash column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-e09c820912814451a06150a1c837e164
Quelldatensatz
uspto-grants-2006_09
Patentnummer
US07109354B2

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