Dodecane → (R)-N-(3,5-dimethylphenyl)-alpha-methylbenzylamine

温度

100 °C

CuOAc (6 mg, 0.05 mmol), N,N-diethylsalicylamide (39 mg, 0.20 mmol) and K3PO4 (425 mg, 2.0 mmol) were put into a screw-capped test tube with a Teflon-lined septum. The tube was then evacuated and backfilled with argon (3 cycles). 5-Bromo-m-xylene (136 μL, 1.0 mmol), (R)-α-methylbenzylamine (193 μL, 1.5 mmol) and DMF (0.5 mL) were added by syringes. The reaction mixture was stirred at 100° C. for 30 h. The reaction mixture was allowed to reach room temperature. Ethyl acetate (˜2 mL), water (˜10 mL), ammonium hydroxide (˜0.5 mL) and dodecane (227 μL) were added. The organic phase was analyzed by GC or GC-MS. The reaction mixture was further extracted by ethyl acetate (4×10 mL). The combined organic phases were washed with brine and dried over Na2SO4. Solvent was removed in vacuo and the yellow residue was purified by column chromatography on silica gel using hexane/ethyl acetate (20:1) as eluent to afford the desired product as a colorless oil (160 mg, 71% yield, 98% ee). Rf=0.4 (hexane/ethyl acetate=20:1). HPLC conditions: (column: Daciel OD; flow rate: 0.7 mL/min; UV lamp: 254 nm; solvent system: hexane/2-propanol (9:1); retention time: 7.80 min).

1. customThe tube was then evacuated
2. customto reach room temperature
3. extractionThe reaction mixture was further extracted by ethyl acetate (4×10 mL)
4. washThe combined organic phases were washed with brine
5. dry with materialdried over Na2SO4
6. customSolvent was removed in vacuo
7. customthe yellow residue was purified by column chromatography on silica gel

ORDレコード

ord-062a28bafa064bd8811f33e8d93fe276

出典データセット

uspto-grants-2005_03

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US06867298B2