Reactions of substituted (2-butene-1,4-diyl)magnesium complexes with carboxylic esters and lactones: Formation of a versatile intermediate capable of generating substituted cyclopentenols, fused-ring cyclopentenols, or β,γ-unsaturated ketones

Article abstract of DOI:10.1021/ja00125a001

Reaction of the magnesium complexes of substituted 1,3-dienes with either carboxylic esters or lactones at low temperature (-78 to -10°C) generates the magnesium salt of a cyclopropanol. This intermediate can either be trapped as an acetate of the cyclopr