Question

Lab Report 21 Nucleophilic Addition Reaction Quastron: What is the IUPAC name of this Enot. (2 marks) cott 2 + OPPha PH P - CHCOREL # + + 2 7 1 TEthyl trans-Cinnamate Prepared by the Wittig reaction! Ethyl trans-cinnamate (1) is synthesized in this experiment by the reaction of benzaldehyde, (2, with the stable Flid (car bethoxy methylene) triphenyl Phosphorane, 7 Question. Draw the arrow pushing Mechanism for this Synthesis reaction (4 marks) ③ Is there evidence of triphenyl phosphine oxide in the final produd? answer with evidence (3 marks) Please substantiate your

Answer 1

The answer is explained in the image given. See the arrow pushing mechanism carefully .

The structure given I UPAC l-ethoxyethene- 1-olate Ethyl group group ethelene Ethyl trans cinnamate mechanismi- H ou to Pha Coet -Cget Betain у PPh3 Coget A LI oxaphosphétane • Qer + PPh₂=0 ods through 14 evident from the mechanism above that the reaction Pro the different intercediates like Betain oxaphosphetane. The oxaphosphetane gives the product with the PPh ₂0... In the reaction mixture, there will phosphine oxide As evidence do NMR experiment with the reaction. crude mixture [ Additional signal from 15 proton of PPh₂=0 will appear] be triphenge