A formal [4 + 2] annulation occurs between 1,3-disubstituted cyclobutenols and internal alkynes in the presence of rhodium(I) catalysts to afford 1,2,3,5-tetrasubstituted benzenes. These benzannulation products are generated through dehydration of the initially formed cyclohexadienols.
一种正式的[4 + 2]环化反应在1,3-二取代
环丁醇和内炔的存在下,由
铑(I)催化剂催化,生成1,2,3,5-四取代苯。这些苯环化产物是通过初生成的
环己二醇的脱
水反应产生的。