4‐dihydro‐4‐hydroxyquinolin‐2(1H)‐ones. Using triphosgene (=bis(trichloromethyl) carbonate), these compounds were converted to 3,3a‐dihydrooxazolo[4,5‐c]quinoline‐2,4(5H,9bH)‐diones. The deamination of the reduction products using HNO2 afforded mixtures of several compounds, from which 3‐alkyl/aryl‐2,3‐dihydro‐1H‐indol‐2‐ones and their 3‐hydroxy and 3‐nitro derivatives were isolated as the products
用NaBH 4立体选择性还原
3-氨基喹啉-2,4-二酮,得到顺式-3-
氨基-3,4-二氢-
4-羟基喹啉-2(1 H)-1 。使用
三光气(=
碳酸二(三
氯甲基)酯),这些化合物被转化为3,3a-dihydrooxazolo [4,5 - c ] quinoline-2,4(5 H,9b H)-二酮。使用HNO 2对还原产物进行脱
氨基反应,得到了几种化合物的混合物,从中分离出3-烷基/芳基-2,3-二氢-1 H-
吲哚-2-酮及其3-羟基和
3-硝基衍
生物。分子重排的产物。