A facile synthesis of 3, 4-dienamides by the reaction of propargyl alcohols with cyclic amide acetals, and their stereoselective rearrangement to 2 (E), 4 (Z)-dienamides …

~75%

~%

~49%

~74%

~%

~69%

~%

~90%

~%

~63%

~%

~55%

~%

~81%

~%

~49%

~78%

~%

~0%

~%

~%

~47%