Ammonia → 4-Morpholinecarbothioamide

A solution of 3.35 g (18.8 mmol) of thiocarbonyl diimidazole in 100 ml of THF was treated with 0.82 ml (9.4 mmol) of morpholine. After being stirred at ambient temperature for 3.5 h, an additional 0.82 ml portion of morpholine was added, and stirring was continued. After 6 h, the solution was treated with excess concentrated aqueous ammonia, and stirred overnight. The resulting solution was concentrated in vacuo, taken up in chloroform, separated from the aqueous phase, dried over Na2 SO4, and concentrated. Purification of the residue by silica gel chromatography using ethyl acetate provided 1.85 g (76%) of the desired compound, Rf 0.17 (10% methanol in chloroform), as a white solid. 1H NMR (CDCl3) δ 3.76 (m, 4H), 3.83 (m, 4H), 5.75 (br, 2H). Mass spectrum: (M+H)+ =147.

1. stirringstirring
2. waitAfter 6 h
3. stirringstirred overnight
4. concentrationThe resulting solution was concentrated in vacuo
5. customseparated from the aqueous phase
6. customdried over Na2 SO4
7. concentrationconcentrated
8. customPurification of the residue by silica gel chromatography

ORD record

ord-cddbf318910340b2ae9fd1131136a226

Source dataset

uspto-grants-1997_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05679797