InCl<sub>3</sub>-Catalyzed [3 + 2] CycloadditionReactions: A Facile Synthesis of<i>trans</i>-Dihydrobenzofuransand Substituted Cyclobutane Derivatives
作者:J. S. Yadav、B. V. Reddy、G. Kondaji
DOI:10.1055/s-2003-39175
日期:——
1,4-Benzoquinones undergo smoothly [3 + 2] cycloaddition reactions with electron rich alkenes in the presence of 10 mol% indium trichloride or 5 mol% iodine under mild conditions to afford the corresponding 2,3-dihydrobenzofurans in excellent yields with trans-selectivity. Similarly, methyl vinyl ketone reacts with electron rich olefins to produce substituited trans-cyclobutane derivatives.