Thionyl Chloride → HCID 12786629, compound

To a solution of 5-chloro-o-anisic acid (50 g) in toluene (100 mL) was added thionyl chloride (50 mL). The reaction mixture was heated under reflux for 2 hrs and distilled using a short path distillation apparatus to give 5-chloro-o-anisyl chloride, which was used in the next step. To a solution of 2-amino-2-methyl-1-propanol (38 mL) in dichloromethane (200 mL) was added a solution of 5-chloro-o-anisyl chloride in dichloromethane (150 mL) dropwise. The reaction mixture was stirred at ambient temperature for 1 hr, dichloromethane was added and the mixture was washed with 2 N hydrochloric acid. The organic phase was separated, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated in vacuo to give N-(2-(1-hydroxy-2-methylpropyl)-5-chloro-2-methoxy benzamide, which was used in the next step. To N-(2-(1 -hydroxy-2-methylpropyl)-5-chloro-2-methoxy benzamide was added thionyl chloride (40 mL) at 0° C. The reaction mixture was stirred for 30 min, warmed to ambient temperature, diluted with diethyl ether (200 mL), and the mixture was stirred for 10 mins. The mixture was decanted, 10% sodium hydroxide solution was added, and the mixture was extracted with ethyl acetate. The organic extracts were combined, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated in vacuo to afford 41 g (64%) of product, mp 50-51° C.

1. stirringthe mixture was stirred for 10 mins
2. customThe mixture was decanted
3. addition10% sodium hydroxide solution was added
4. extractionthe mixture was extracted with ethyl acetate
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationthe filtrate was concentrated in vacuo

ORD record

ord-24fd36a1200e40a5830b772495d86352

Source dataset

uspto-grants-1999_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06004977