The Claisen Rearrangement in Aromatic Heterocyclic Compounds. I. The ortho-Claisen Rearrangement of Allyl, Methallyl, and Crotyl Ethers of 2-Methyl-4-quinolinol
作者:Yasuo Makisumi
DOI:10.1248/cpb.12.789
日期:——
The thermal rearrangement of allyl, methallyl, and crotyl ethers (Ia, Ib, and Ic) of 2-methyl-4-quinolinol was investigated and the ortho-Claisen rearrangement products (IIa, IIb, and IIc) with the inversion of the migrating group and their consecutive intramolecular cyclization products, the 2, 3-dihydro [3, 2-c] quinoline derivatives (IIIa, IIIb, and IIIc) were obtained. No detectable amounts of the 1-allyl-2-methyl-4(1H)-quinolones resulting from the alkyl rearrangement were formed. The different results between the thermal rearrangement of the allyl 2-methyl-4-quinolyl ethers and that of the 7-allyloxy-s-triazolo [1, 5-α] pyrimidines were discussed.
研究了 2-甲基-4-喹啉醇的烯丙基醚、甲基烯丙基醚和巴豆基醚(Ia、Ib 和 Ic)的热重排,得到了迁移基团反转的正交-克莱森重排产物(IIa、IIb 和 IIc)及其连续的分子内环化产物,即 2,3-二氢 [3,2-c] 喹啉衍生物(IIIa、IIIb 和 IIIc)。烷基重排产生的 1-烯丙基-2-甲基-4(1H)-喹啉酮没有形成可检测到的数量。讨论了烯丙基 2-甲基-4-喹啉醚热重排与 7-烯丙氧基-s-三唑并[1,5-α]嘧啶热重排的不同结果。