ABC26OR1021 · Pericyclic Reactions
Subject: Organic Chemistry · Chapter: Pericyclic Reactions · Topic: Electrocyclic · Exam: NET JUNE 2012 · Marks: 2 · Difficulty: Medium
The two step conversion of 7-dehydrocholesterol to vitamin $\mathrm{D_3}$ proceeds through 
$\rightarrow$ 
$\rightarrow$ (a)Photochemical electrocyclic disrotatory ring opening; and thermal antarafacial [1, 7]-H shift.
(b)Photochemical electrocyclic conrotatory ring opening; and thermal antarafacial [1, 7]-H shift.
(c)Thermal electrocyclic conrotatory ring opening; and photochemical superafacial [1, 7]-H shift.
(d)Thermal electrocyclic disrotatory ring opening; and thermal suprafacial [1, 7]-H shift.
Answer
Answer (as printed): B
Explanation
No explanation was printed for this question.