An unexpected Diels-Alder type cycloaddition of cyclic enone ethylene ketals  

作　　者：CHOW,Yuan L. CHENG,Xian-En ZHANG,Yu-Huang Department of Chemistry,Simon Fraser University,Burnaby,B.C.Canada V5A 1S6 

出　　处：《Chinese Journal of Chemistry》1993年第4期350-359,共8页中国化学（英文版）

摘　　要：The ethylene ketal of 2-cyelopentenone and 2-cyelohexenone in acetonitrile in the presence of a trace of an acid rapidly undergoes the Diels-Alder type dimerization,The products are regiospecific but not stereoselective and are hydrolysed sequentially to afford keto-ketals and diketones whose structures are determined by extensive applications of NMR spectroscopy.The ethylene ketal of 2-cyelopentenone and 2-cyelohexenone in acetonitrile in the presence of a trace of an acid rapidly undergoes the Diels-Alder type dimerization,The products are regiospecific but not stereoselective and are hydrolysed sequentially to afford keto-ketals and diketones whose structures are determined by extensive applications of NMR spectroscopy.

关 键 词：An unexpected Diels-Alder type cycloaddition of cyclic enone ethylene ketals TYPE 

分 类 号：O6[理学—化学]