Dimethyl Sulfate → HCID 14960638, compound

Temperature

0 °C

To a suspension of NaH (1.50 g, 37.5 mmol, 60% dispersion) in dry THF (200 mL) cooled to 0° C. was added 3-hydroxy-3-(2-naphthalenyl)propionitrile (4.92 g, 25 mmol) in THF (50 mL) dropwise over 20 minutes. The resulting solution was stirred at 0° C. for 5 minutes and dimethylsulfate (4.72 g, 37.5 mmol) was added in one portion. The reaction mixture was stirred at 0° C. for 20 minutes and room temperature for 1.5 hours. The reaction was then diluted with H2O (50 mL) and the volatiles were removed in vacuo. The residue was partitioned between CH2Cl2 (250 mL) and H2O (200 mL). The aqueous phase was extracted with CH2Cl2 (1×250 mL), the combined organic layers dried (Na2SO4) and concentrated in vacuo to give a thick yellow oil. This was purified by preparative HPLC (SiO2 : gradient EtOAc/hexane) to give the product as a light yellow oil (4.58 g, 87%).

1. stirringThe reaction mixture was stirred at 0° C. for 20 minutes and room temperature for 1.5 hours
2. customthe volatiles were removed in vacuo
3. customThe residue was partitioned between CH2Cl2 (250 mL) and H2O (200 mL)
4. extractionThe aqueous phase was extracted with CH2Cl2 (1×250 mL)
5. dry with materialthe combined organic layers dried (Na2SO4)
6. concentrationconcentrated in vacuo
7. customto give a thick yellow oil
8. customThis was purified by preparative HPLC (SiO2 : gradient EtOAc/hexane)

ORD record

ord-7ce3805606144f2db676071770b694f3

Source dataset

uspto-grants-1990_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04895861