(a) Refer to Study Problem 28.2 and, assuming an antarafacial migration, give the structure of a starting material that would give a stereoisomer of the product with the R configuration at the isotopically substituted carbon.

(b) Give the structure of another starting material that would give the same stereoisomer as in part (a)

Study Problem 28.2

Classify the following sigmatropic reaction by giving its bracketed-number designation and its stereochemistry with respect to the plane of the π-electron system.

Transcribed Image Text:

CH3 CH3 H S configuration