Hydroxyiminoisoquinolin-3(2H)-ones. Part 4. Synthesis and reactions of isoquinoline-3,4-diones
作者:István Tikk、Gyula Deák、Gábor Tóth、József Tamás
DOI:10.1039/p19840000619
日期:——
4-hydroxyimino-1 -phenyl-1,4-dihydroisoquinolin-3(2H)-ones (1), (2), and (3) with formaldehyde gave isoquinoline-3,4-diones; this reaction of the N-unsubstituted lactams (1) and (2) was found to be accompanied by hydroxymethylation of the amide group to yield compounds (4) and (5). In the presence of sodium acetate and hydroxylamine, the product from (4) was not the oxime but 3,4-dihydroxy-1 -phenylisoquinoline
将4-羟基亚氨基-1-苯基-1,4-二氢异喹啉-3(2H)-酮脱甲醛(1),(2)和(3),用甲醛得到异喹啉-3,4-二酮。发现N-未取代的内酰胺(1)和(2)的该反应伴随有酰胺基的羟甲基化,从而产生化合物(4)和(5)。在乙酸钠和羟胺的存在下,(4)的产物不是肟,而是3,4-二羟基-1-苯基异喹啉(14)。二恶英衍生物(4)和(6)产生4-羟基-3-酮(7)和(8)和4-羟基-1,2,3,4-四氢异喹啉(9)和(10)。产物的立体化学通过核磁共振光谱法测定。