Chemistry Letters, Vol.31, No.7, 748-749, 2002
Synthesis of functionalized cyclobutene derivatives via selective S(N)2' reaction of dichlorocyclobutenes
Dichlorocyclobutenone acetals, available via the cycloaddition of dichloroketene and alkynes followed by acetalization, undergo selective S(N)2' attack by various nucleophiles to give a variety of functionalized cyclobutene derivatives in high yields.