Science, asked by relansujata, 2 months ago

Question 2 :
Formation of provitamin D2 from
ergosterol takes place by
Electrocyclic ring opening
Electrocycling ring closure
Cycloaddition
Sigmatropic​

Answers

Answered by abhishekkulbainur
0

Answer:

Electrocyclic ring-opening

Firstly, in the presence of heat, electrocyclic-ring opening takes place (there is no possibility of sigmatropic rearrangement) and after ring opening it acts as diene and undergo [4+2] cycloaddition reaction, i.e., Diels-Alder reaction

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