Which of the Following Best Explains the Rearrangement When Provitamin

question 62

Multiple Choice

Which of the following best explains the rearrangement when provitamin D₃ rearranges to vitamin D₃?

• A)[1,7] cycloaddition rearrangement, antarafacial
• B)[1,7] cycloaddition rearrangement, suprafacial
• C)[1,7] sigmatropic rearrangement, antarafacial
• D)[1,7] sigmatropic rearrangement, suprafacial
• E)[1,7] electrocyclic reaction, suprafacial

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