Water → HCID 83305080, compound

Temperature

0 °C

A mixture of 2-chloro-4-fluorobenzaldehyde (3.17 g, 20 mmol, 1.0 eq.) and aminoacetaldehyde dimethyl acetal (2.18 mL, 20 mmol, 1.0 eq.) in toluene (50 mL) was stirred at 130° C. with concomitant removal of H2O (Dean-Stark) for 2.5 hours. The mixture was concentrated in vacuo and dried under h.v. The residue was dissolved in EtOH (100 mL). The solution was cooled to 0° C. and NaBH4 (1.14 g, 30 mmol, 1.5 eq.) was added portionwise. The cooling bath was removed and the solution was stirred at r.t. for 18 hours. The resulting reaction mixture was quenched with sat. aq. NaHCO3 soln. (150 mL). The mixture was extracted with DCM (3×50 mL). The comb. org. phases were washed with sat. aq. NaCl soln. (1×50 mL), dried over MgSO4, and concentrated in vacuo to give (2-chloro-4-fluoro-benzyl)-(2,2-dimethoxy-ethyl)-amine as a yellow oil. The product was used without further purification.

1. concentrationThe mixture was concentrated in vacuo
2. customdried under h.v
3. dissolutionThe residue was dissolved in EtOH (100 mL)
4. customThe cooling bath was removed
5. customThe resulting reaction mixture
6. customwas quenched with sat. aq. NaHCO3 soln
7. extractionThe mixture was extracted with DCM (3×50 mL)
8. washphases were washed with sat. aq. NaCl soln
9. dry with material(1×50 mL), dried over MgSO4
10. concentrationconcentrated in vacuo

ORD record

ord-7817dd4b69f04989869aed4e6c9ee58e

Source dataset

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09255090B2