Allyl Mercaptan → 4-Allylthioazetidin-2-one

A solution of 42.9 g of sodium hydroxide in 500 ml of water was made up under nitrogen and cooled to room temperature, 108 ml of allyl mercaptan was added and the mixture stirred under nitrogen for 30 minutes. 138.7 g of 4-acetoxyazetidin-2-one was added to the mixture over 10 minutes under nitrogen and the reaction mixture was stirred overnight in an air atmosphere. The reaction mixture was extracted into dichloromethane (6×250 ml). The organic layer was washed with water (2×250 ml), dried over magnesium sulphate and evaporated in vacuo to dryness. Purification, over silica gel and elution with hexane-ethylacetate, afforded the above product as a yellow oil. (112.1 g, 73% of the theoretical yield).

1. stirringthe reaction mixture was stirred overnight in an air atmosphere
2. extractionThe reaction mixture was extracted into dichloromethane (6×250 ml)
3. washThe organic layer was washed with water (2×250 ml)
4. dry with materialdried over magnesium sulphate
5. customevaporated in vacuo to dryness
6. customPurification
7. washover silica gel and elution with hexane-ethylacetate

ORD record

ord-dad2eed20186402398cc850a972487d1

Source dataset

uspto-grants-1987_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04684640