Sodium Hydroxide → HCID 178483103, compound

A solution of 43 g of N,N-dimethyl-N'-ethoxycarbonyl-thiourea, 25 ml of sodium hydroxide and 250 ml of water and a solution of 1M sodium hypochlorite were simultaneously added at 0° to 5° C to 450 ml of concentrated ammonium hydroxide and the reaction mixture was stirred for 2 hours at 0° to 5° C and 3 hours at room temperature. The mixture was evaporated until it congealed into a mass and the mass was adjusted to a pH of 4 with concentrated hydrochloric acid. The mixture was extracted with chloroform and the extracts were dried over magnesium sulfate and were evaporated to dryness. The crystalline residue was washed with petroleum ether (B.p. = 40°-75° C) to obtain 11 g of 3-hydroxy-5-dimethylamino-1,2,4-thiadiazole melting at 142° C and having a Rf = 0.2 (acetone -CHCl3 - 1-1).

1. customThe mixture was evaporated until it
2. extractionThe mixture was extracted with chloroform
3. dry with materialthe extracts were dried over magnesium sulfate
4. customwere evaporated to dryness
5. washThe crystalline residue was washed with petroleum ether (B.p. = 40°-75° C)

ORD record

ord-c2cab15c95c44c429f9afff82635b186

Source dataset

uspto-grants-1978_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04067720