| 摘要 |
1338500 Dioxazole and oxathiazole derivatives BAYER AG 3 Dec 1971 [5 Dec 1970] 56264/71 Heading C2C [Also in Division A5] Compounds of the general formula wherein X is O or S, Y is O or S, Z is halogen, methyl or methoxy and n is 0, 1 or 2, are prepared by reacting a hydroxamic acid or thiohydroxamic acid with phosgene or thiophosgene. |
