Question

For each set of electrocyclic reactions below, draw a mechanism that accounts for the transformation and predict the relative stereochemistry at each stereogenic carbon. More than one step may be required. Indicate whether each step is conrotatory or disrotatory, where appropriate 1. он но он (b) Consider the two cyclobutenes below. One can be opened casily under thermal conditions, while the other cannot. Which one opens readily with heat and why? Will the same be true under photochemical conditions? НН

Answer 1

Con ใส่ 왜 9