Formal [4 + 2] cycloaddition of alkoxy-substituted donor-acceptor cyclobutanes and aldehydes catalyzed by Yb(OTf)3.
Moustafa
Mahmoud M Abd Rabo
MM
Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada.
Stevens
Andrew C
AC
Machin
Ben P
BP
Pagenkopf
Brian L
BL