2,5,5-Trimethyl-2-oxazolin-4-one, its perchlorate, and α-acetoxyisobutyronitrile by acetylation of acetone cyanohydrin
作者:A.T. Balaban、Anisia Bota、G.N. Dorofeenko、V.D. Karpenko、Yu.I. Ryabukhin
DOI:10.1016/0040-4020(78)80115-x
日期:1978.1
Acetone cyanohydrin (1) yields on acylation and ring closure with anhydrides and perchloric acid. 2-oxazolin-4-onium perchlorates 5a, 5c or 5d. The same perchlorates (5a, 5b) may be obtained under similar conditions from acyloxy-nitriles (2) or -amides (4). Perchlorates 5 may be deprotonated in pyridine to 2-oxazolin-4-ones (6), but in aqueous solution they undergo ring opening to acyloxy-amides 4a
丙酮氰醇(1)在酸酐和高氯酸的酰化和闭环反应中产生。2-恶唑啉-4-高氯酸盐5a,5c或5d。在类似条件下,可以从酰氧基腈(2)或-酰胺(4)获得相同的高氯酸盐(5a,5b )。高氯酸盐5可以在吡啶中去质子化为2 - oxazolin -4-ones (6),但在水溶液中它们会开环成酰氧基酰胺4a.cd或N-苯甲酰基-α-羟基异丁酰胺7b。