Hydrochloric Acid → HCID 58496614, compound

Temperature

0 °C

To a solution of S(−)-α,α-diphenyl-2-pyrrolidinemethanol (500 mg, 2 mmol) and trimethylborate (0.27 ml, 2.4 mmol) in THF (20 mL) was added borane-dimethylsulfide complex (20 mL, 2M in THF, 40 mmol). The mixture was cooled to 0° C. and 1-pyridin-3-ylbutan-1-one was added dropwise over 4 h. The solution was stirred at RT overnight and then treated with 2M HCl (175 mL) and stirring continued for 4 h. The-volatiles were removed under reduced pressure and the resulting cloudy solution basified to pH 11 with aqueous ammonia. The product was extracted into ethyl acetate (3×100 mL) and the combined organic layers washed with brine (100 mL) and dried (Na2SO4). Removal of the solvent under reduced pressure afforded ˜3 g of product.

1. stirringstirring
2. waitcontinued for 4 h
3. customThe-volatiles were removed under reduced pressure
4. extractionThe product was extracted into ethyl acetate (3×100 mL)
5. washthe combined organic layers washed with brine (100 mL)
6. dry with materialdried (Na2SO4)
7. customRemoval of the solvent under reduced pressure

ORD record

ord-86e9d4addec6412198d43b97f6fe2951

Source dataset

uspto-grants-2011_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07981900B2