Question: using th D A ( organic 2 ) 13.15 (a) Use the trans diester because the stereochemistry is retained in the adduct. (b) Here, the

using th D A ( organic 2 )

13.15 (a) Use the trans diester because the stereochemistry is retained in the adduct. (b) Here, the cis relationship of the acetyl groups requires the use of the cis dienophile. 13.16 13.15 (a) Use the trans diester because the stereochemistry is retained in the adduct. (b) Here, the cis relationship of the acetyl groups requires the use of the cis dienophile. 13.16

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