作者:Abraham Thomas、Jai N. Vishwakarma、Satyam Apparao、Hiriyakkanavar Ila、Hiriyakkanavar Junjappa
DOI:10.1016/s0040-4020(01)86728-4
日期:1988.1
corresponding N,N-arylacetals 7a-d afforded the respective 2-N-aryl-3-(arylimino)-5-aryl-4-isoxazolines 8a-d under similar conditions via oxidative cyclization. The oxidation of N,N-(4-methylphenyl)acetal 7e gave 3-benzoyl-5-Bethyl-2-(4-methylphenylamino)-indole 9a, iminodiacetate 10 and the dimeric indole 11, besides the corresponding 3-(4-methylphenyl-imino) isoxazoline 8e in varying yields. The N,N-(2-methylphenyl)
α-氧杂环丁烯-S,N-苯基(1a)和S,N-苄基(1b)缩醛的四乙酸铅氧化分别得到亚氨基乙酸酯2和α-乙酰氧基-S,N-乙缩醛3,而相应的S,N-乙缩醛1c产生亚氨基二乙酸酯5。相应的N,N-芳基缩醛7a-d在相似条件下通过氧化环化得到相应的2-N-芳基-3-(芳基)-5-芳基-4-异恶唑啉8a-d。N,N-(4-甲基苯基)缩醛7e的氧化得到3-苯甲酰基-5-B-2--2-(4-甲基苯基氨基)-吲哚9a,亚氨基二乙酸酯10和二聚吲哚11,除了相应的3-(4-甲基苯基亚氨基)异恶唑啉8e的收率不同。N,N-(2-甲基苯基)乙缩醛7f和7g在相似条件下以良好的收率得到各自的3-(2-甲基苯基亚氨基)异恶唑啉8f,8g和吲哚9b,9c。