Diisobutylaluminumhydride → (2S, 4S)-1-N-Dodecy-4-(4-iodophenoxy)pyrrolidine-2-methanol

To a solution of (2S, 4S)-1-N-dodecyl-4-(4-iodophenoxy)pyrrolidine-2-carboxylic acid, methyl ester (2.09 g, 4.06 mmol) in tetrahydrofuran (20 ml) at −78° C. was added dropwise diisobutylaluminum hydride (1.0M in hexane, 15.0 ml, 15.0 mmol). After stirring at this temperature for 5 min. and at 0° C. for 2.5 h, the reaction was quenched with water at 0° C. After stirring at r.t. for 10 min., the mixture was diluted with ethyl acetate (250 ml), washed with 2N sodium hydroxide (3×100 ml), 35% sodium and potassium tartrate (2×100 ml), brine (100 ml), dried over sodium sulfate and concentrated in vacuo. The residue was chromatographed on silica gel (hexane/ethyl acetate 3:1 to 2:1) to afford the title compound (1.65 g, 79%) as a colorless oil. [a]D=−18.5° (c 0.92, CHCl3).

1. customthe reaction was quenched with water at 0° C
2. stirringAfter stirring at r.t. for 10 min.
3. additionthe mixture was diluted with ethyl acetate (250 ml)
4. washwashed with 2N sodium hydroxide (3×100 ml), 35% sodium and potassium tartrate (2×100 ml), brine (100 ml)
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated in vacuo
7. customThe residue was chromatographed on silica gel (hexane/ethyl acetate 3:1 to 2:1)

ORD-Eintrag

ord-c6dc61fa671c47399ac397d50c0da709

Quelldatensatz

uspto-grants-2002_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06350892B1