Under what conditions would a 1,5-hydrogen shift occur in a sigmatropic rearrangement?

Question

Quizplus · Accepted Answer

A 1,5-hydrogen shift occurs in a sigmatropic rearrangement under thermal conditions and through the suprafacial pathway. Therefore, choice D, which includes both thermal and suprafacial pathway, is the correct answer. Choice B, which includes photochemical conditions, is incorrect as a 1,5-hydrogen shift is not typically observed in photochemical sigmatropic rearrangements.

Under What Conditions Would a 1,5-Hydrogen Shift Occur in a Sigmatropic