Question

Given the following reaction below, answer the following questions. Refer to the labeled carbons in the starting material. Write only the numerical symbol in the space provided, ex. 1 Numbering is not necessarily following IUPAC rules, but used for reference purposes only. igues Intramolecular Aldol condensation su 8c numbering is contiguous from L to R A B • Which carbon became the enolate in the ring formation of product A? • Which carbonyl carbon was attacked in the ring formation of product A? • Which carbon became the enolate in the ring formation of product B? • Which carbonyl carbon was attacked in the ring formation of product B?

Answer 1

Ans:- intramolec4197 aldoi condensation (A) (B) First we see mechanism for each product Mechanism for product Base (cadbanion) Cenolate anion) e 7 но 9 HO 6 2 5 2 4 -H₂O 8 9 7 6 - 2 5 O khich carbon became the enolate in the Ring Formation of produck A ? carbon-2 31 blhich caobonyl corrbon was attacked in the Ring formation of product A? carbon-6

Mechanism for product 6 4 DO Da 3 "។ s H a SGI Cat (carbonion) H 9 cenolake anion) Hol 00 al 4 5 Jaro ΞΟ 3) Which carbon became the enolate in the Ring Formation of product B ? carbon 7 Which carbonyl carbon was attacked in the Ring Formation of product Be carbon