中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Methyl 4-hydroxy-2-oxo-5,6,7,8-tetrahydrochromene-3-carboxylate | 1005333-18-5 | C11H12O5 | 224.213 |
—— | 5,6,7,8-tetrahydro-4-hydroxy-3-(1-phenylpropyl)-2H-1-benzopyran-2-one | —— | C18H20O3 | 284.355 |
—— | benzyl N-[3-[1-(4-hydroxy-2-oxo-5,6,7,8-tetrahydrochromen-3-yl)propyl]phenyl]carbamate | 181929-82-8 | C26H27NO5 | 433.504 |
N,N-dialkyl-N′-chlorosulfonylchloroformamidines 1 reacted regioselectively with 4-hydroxy-2-pyrone derivatives 2 to give 3-dialkylamino-1,1,8-trioxo-1H-1λ6-pyrano[3,4-e][1,4,3]oxathiazines 3. Dichloride 1b reacted regioselectively with 1,3-dimethylbarbituric acid 10 to give 3-diethylamino-5,7-dimethyl-1,1,6,8-tetraoxo-1H-1λ6-pyrimido[5,4-e][1,4,3]oxathiazine 11. The compounds 3 and 11 are derivatives of new ring systems.