Zeolite β Induced Rearrangement of Allyl Benzyl Ethers. 6. Variation of the Aromatic Part and Synthesis of Dihydronaphthalene Derivatives
作者:Johan Wennerberg、Fredrik Ek、Anna Hansson、Torbjörn Frejd
DOI:10.1021/jo980698n
日期:1999.1.1
The zeolite beta induced rearrangement of substituted allyl benzyl ethers to give 4-arylbutanals was investigated with respect to the substituents in the aromatic ring. In some cases the resulting aldehydes cyclized spontaneously to give dihydronaphthalene derivatives. The rearrangement and also the ring closure to dihydronaphthalenes failed or gave poor yields in cases where too weak electron-donating
关于芳族环中的取代基,研究了β沸石诱导的取代的烯丙基苄基醚的重排以产生4-芳基丁醛。在某些情况下,所得醛类自发环化,生成二氢萘衍生物。在芳环中存在太弱的供电子性取代基的情况下,重排以及对二氢萘的闭环失败或收率不佳。相对于环化的过渡态,沸石的孔径尺寸似乎也很重要。迄今为止,用潜在地能够稳定阳离子中心的其他结构代替苄基部分至今尚未导致成功的重排。