Ya. Strelenko et al., [2-KETONES CATALYZED BY AN RH(I)-SN(II) SYSTEM(2+2]CYCLOADDITION REACTION WITH THE PARTICIPATION OF UNSATURATED), Russian chemical bulletin, 44(11), 1995, pp. 2187-2189
Codimerization of vinyl ketones with metallylacetone or metallylacetop
henone in the presence of [RhCl(C2H4)(2)](2)-SnCl2 affords substituted
endo-2-acyl-8-oxabicyclo[3.2.1] octanes, the products of the formal [
2+2+2] cycloaddition.