1,3-Dithiane → Methyl [(3-sulfanylpropyl)sulfanyl]acetate

An ice-cold solution of 1,3-dithiane (2.0 mL, 19.9 mmol) in THF (40 mL) was treated with NaH (819 mg, 20.5 mmol). After 30 min., methyl bromoacetate (1.9 mL, 20.0 mmol) was added and the mixture stirred for 3.5 h at room temperature. The reaction was quenched by addition of MeOH and then 50 mL 1 M HCl. The mixture was extracted with ether (2×50 mL) and the combined ether solution washed with saturated sodium bicarbonate solution (50 mL) and brine (50 mL) and then was dried (MgSO4), filtered and evaporated. Purification by flash chromatography on silica gel (10-15% ethyl acetate/hexanes) gave 971 mg (5.38 mmol, 27%) of the thiol.

1. customThe reaction was quenched by addition of MeOH
2. extractionThe mixture was extracted with ether (2×50 mL)
3. washthe combined ether solution washed with saturated sodium bicarbonate solution (50 mL) and brine (50 mL)
4. dry with materialwas dried (MgSO4)
5. filtrationfiltered
6. customevaporated
7. customPurification by flash chromatography on silica gel (10-15% ethyl acetate/hexanes)

ORD record

ord-d8f3dc44649645cfb72b6fda2a0cfc5b

Source dataset

uspto-grants-2010_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07855226B2