The amides prepared from 5, 6-dihydro-2-methyl-1, 4-oxathiin-3-carbonyl chloride 2 and imidamides 4, carbamimidothioates 4, 2-benzimidazolamine 7, 2-benzothiazolamine 12, and 2-thiazolamine have been studied. The reaction of 2 with imidamides 4 and with carbamimidothioates 4 in the presence of base gave the amides 5, which when heated in toluene underwent the 1, 4-oxathiin ring opening and rearrangement to produce 2- ...
![4(1H)-Pyrimidinone, 5-[(2-hydroxyethylthio]-6-methyl-2-(trichloromethyl)- Structure](https://image.chemsrc.com/caspic/484/82551-97-1.png)