<i>o</i>-(α-Benzotriazolylalkyl)phenols: Novel Precursors of<i>o</i>-Quinone Methides
作者:Alan >r. Katritzky、Xiangfu Lan
DOI:10.1055/s-1992-26221
日期:——
1-[α-(Benzotriazol-1-yl)alkyl]-2-napthols and 2-[(benzotriazol-1-yl)-methyl]phenols have been shown to lose a molecule of benzotriazole to generate o-quinone methides, which can be trapped with electron-rich olefins (ethyl vinyl ether, 1-vinyl-2-pyrrolidinone) to afford chroman derivatives, i.e. 2,3-dihydro-1H-naphtho[2,1-b]pyrans and 3,4-dihydro-2H-1-benzopyrans, respectively.
研究表明,1-[δ-(苯并三唑-1-基)烷基]-2-萘酚和 2-[(苯并三唑-1-基)-甲基]苯酚在失去一分子苯并三唑后会生成邻醌甲酯,这些邻醌甲酯可与富含电子的烯烃(乙烯基乙醚、1-乙烯基-2-吡咯烷酮)作用生成铬烷衍生物,即 2,3-二氢-1H-萘并[2,1-b]吡喃和 3,4-二氢-2H-1-苯并吡喃。即 2,3-二氢-1H-萘并[2,1-b]吡喃和 3,4-二氢-2H-1-苯并吡喃。