Novel Route to Functionalized IndansviaFormal [3 + 2] Cycloadditions of 1-Benzylbenzotriazoles with Alkenes
摘要:
alpha-Functionalized 1-benzylbenzotrialzoles (3, 4 and 12), derived from the lithiation of 1-(2,3-dimethoxyhenzyl)benzotriazole 2 followed by reactions with electrophiles, or from the condensation of benzyl alcohol 11 with benzotriazole, undergo formal [3 + 2] cycloadditions with styrenes upon treatment with ZnBr2 to give functionalized indans (9, 10, 13 and 14).
Benzotriazole-Mediated Synthesis of α-Di- and α-Trisubstituted Ethers and Sulfides
作者:Alan R. Katritzky、Simona C. Jurczyk、Maria Szajda、Irina V. Shcherbakova、Jamshed N. Lam
DOI:10.1055/s-1994-25512
日期:——
Ethylaryl- and diethylaryl(benzotriazol-1-yl)methanes, obtained by mono- or dialkylation of substituted (benzotriazol-1-ylmethyl)benzenes, react with sodium alkoxides, phenol and thiophenol to yield the corresponding α-di- and α-trisubstituted ethers and sulfides. With amines, instead of nucleophile displacement, products arising from reduction or elimination are formed.
Novel Route to Functionalized Indans<i>via</i>Formal [3 + 2] Cycloadditions of 1-Benzylbenzotriazoles with Alkenes
作者:Alan R. Katritzky、Guifen Zhang、Linghong Xie
DOI:10.1080/00397919708004110
日期:1997.7
alpha-Functionalized 1-benzylbenzotrialzoles (3, 4 and 12), derived from the lithiation of 1-(2,3-dimethoxyhenzyl)benzotriazole 2 followed by reactions with electrophiles, or from the condensation of benzyl alcohol 11 with benzotriazole, undergo formal [3 + 2] cycloadditions with styrenes upon treatment with ZnBr2 to give functionalized indans (9, 10, 13 and 14).