Sodium hydride → 1-Benzhydryl-3-(methoxymethylene)azetidine

Temperatur

0 °C

To a suspension of sodium hydride (60% mineral oil dispersion, 0.10 g, 2.3 mmol) in anhydrous tetrahydrofuran (30 mL) was added (methyoxymethyl)triphenylphosphonium chloride (0.80 g, 2.3 mmol) at 0° C. The mixture was stirred at 0° C. for 40 minutes, then a solution of 1-benzhydryl-azetidin-3-one (0.50 g, 2.1 mmol) in tetrahydrofuran was introduced at 0° C. The resulting mixture was refluxed for 2 hours. The reaction was quenched with water and extracted with methylene chloride (3×50 mL). The organic layer was washed with water (3×50 mL), dried over anhydrous sodium sulfate, filtered and concentrated in vacuum. The crude oil was column chromatographed on silica gel (20% ethyl acetate-hexane). The product-containing fractions were concentrated under vacuum to give 0.29 g (52%) of the title compound as a light yellow solid, m.p. 56-58° C.

1. temperatureThe resulting mixture was refluxed for 2 hours
2. customThe reaction was quenched with water
3. extractionextracted with methylene chloride (3×50 mL)
4. washThe organic layer was washed with water (3×50 mL)
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuum
8. customchromatographed on silica gel (20% ethyl acetate-hexane)
9. concentrationThe product-containing fractions were concentrated under vacuum

ORD-Eintrag

ord-3fd7fe6359cb45f0a0d22f0fc75f564a

Quelldatensatz

uspto-grants-2008_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07419986B2