Synthesis, acetylation and silylation of (1E)-2-diethoxyphosphonylbuta-1,3-dien-1-ols: A convenient route to new, activated dienylphosphonates

Article abstract of DOI:10.1055/s-1995-4122

Lithiated carbanions of allylic phosphonates 1 showed strict α-regioselectivity in their reaction with ethyl formate, giving stereoselectively (1E)-2-phosphonodienols 3b and 3d, or a mixture of 3c with its tautomeric aldehyde 4c, or the conjugated aldehyd