Q5(c). α-Keto esters irradiated in alcohols
Write down the product(s) in the following reactions: (i) C₆H₅COCOOC₂H₅ + CH₃CH(OH)C₂H₅ —hν→ (ii) CH₃COCOOC₂H₅ + CH₃OH —hν→
Answer in brief
(i) Butan-2-yl mandelate, C₆H₅CH(OH)COOCH(CH₃)C₂H₅, + ethanal. (ii) Methyl lactate, CH₃CH(OH)COOCH₃, + ethanal. The ester alkyl is replaced by that of the solvent alcohol.
Part of VKC Basic
Read the key points and the full model answer with VKC Basic
VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.
The full model answer
As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.
CoversNorrish type IIα-keto esterphotochemistryγ-hydrogen abstractionhydroxyketene1,4-biradical
All parts of Question 5
- 5(a) Bases of DNA and RNA; stability of DNA and RNA10 marks
- 5(b) P, Q and R from an enyne10 marks
- 5(c) α-Keto esters irradiated in alcohols10 marks
- 5(d) Higher λmax in each pair10 marks
- 5(e) Number of ¹H NMR signals and order of chemical shift10 marks