Ammonium Chloride → {1-Cyano-3-ethyl-5-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-pent-3-enyl}-phosphonic Acid Diethyl Ester

HRID 540706

Reaktionsgleichung

Reaktionsgleichung von HRID 540706
[C:1]([CH2:3][P:4](=[O:11])([O:8][CH2:9][CH3:10])[O:5][CH2:6][CH3:7])#[N:2].C[Si]([N-][Si](C)(C)C)(C)C.[Na+].Br[CH2:23][C:24]([CH2:47][CH3:48])=[CH:25][CH2:26][C:27]1[C:35]([O:36][CH2:37][CH2:38][Si:39]([CH3:42])([CH3:41])[CH3:40])=[C:34]2[C:30]([CH2:31][O:32][C:33]2=[O:43])=[C:29]([CH3:44])[C:28]=1[O:45][CH3:46].[Cl-].[NH4+]>C1COCC1>[CH2:6]([O:5][P:4]([CH:3]([C:1]#[N:2])[CH2:23][C:24]([CH2:47][CH3:48])=[CH:25][CH2:26][C:27]1[C:35]([O:36][CH2:37][CH2:38][Si:39]([CH3:42])([CH3:40])[CH3:41])=[C:34]2[C:30](=[C:29]([CH3:44])[C:28]=1[O:45][CH3:46])[CH2:31][O:32][C:33]2=[O:43])(=[O:11])[O:8][CH2:9][CH3:10])[CH3:7]

Komponenten

6

Edukt 4

HCID 25517Ammonium ChlorideHCID 75676Diethyl (cyanomethyl)phosphonateHCID 2724254Sodium bis(trimethylsilyl)amideHCID 670098846-(3-Bromomethyl-pent-2-enyl)-5-methoxy-4-methyl-7-(2-trimethylsilanyl-ethoxy)-3H-isobenzofuran-1-one

Produkt 1

HCID 72563633{1-Cyano-3-ethyl-5-[6-methoxy-7-methyl-3-oxo-4-(2-trimethylsilanyl-ethoxy)-1,3-dihydro-isobenzofuran-5-yl]-pent-3-enyl}-phosphonic Acid Diethyl EsterAusbeute 42 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel3×

Versuchsvorschrift

To a solution of diethyl cyanomethylphosphonate (233 mg, 1.32 mmol) in THF (1 mL) was added a THF solution of sodium bis(trimethysilyl)amide (1.0 M, 1.21 mL, 1.21 mmol). After stirring for 30 minutes, the solution was added dropwise to a solution of 6-(3-bromomethyl-pent-2-enyl)-5-methoxy-4-methyl-7-(2-trimethylsilanyl-ethoxy)-3H-isobenzofuran-1-one (100 mg, 0.22 mmol) in THF (1 mL). The resulting mixture was allowed to stir at room temperature overnight before saturated aqueous ammonium chloride was added. The reaction mixture was extracted with ethyl acetate. The organic layer was dried over sodium sulfate and concentrated to dryness. The residue was purified by preparative reverse-phase HPLC, affording 51 mg (42%) of the desired product. 1H NMR (300 MHz, CDCl3) δ 0.04 (s, 9H), 1.07 (t, 3H), 1.24 (dd, 2H, J=7, 8 Hz), 1.36 (t, 6H), 2.12 (m, 1H), 2.18 (s, 3H), 2.35-2.47 (m, 2H), 2.67 (m, 1H), 3.00-3.14 (m, 1H), 3.44 (d, J=7.2, 2H), 3.79 (s, 3H), 4.12-4.37 (m, 6H), 5.13 (s, 2H), 5.38 (t, J=7.2 Hz, 1H) ppm; 31P (121.4 MHz, CDCl3) δ 18.26 ppm; MS (m/z) 574 [M+Na]+.

Aufarbeitung

  1. additionwas added
  2. extractionThe reaction mixture was extracted with ethyl acetate
  3. dry with materialThe organic layer was dried over sodium sulfate
  4. concentrationconcentrated to dryness
  5. customThe residue was purified by preparative reverse-phase HPLC

Quellen und Nachweise

ORD-Eintrag
ord-e1b679a94dc9464ab1a753680a053b8c
Quelldatensatz
uspto-grants-2014_10
Patentnummer
US08871785B2

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