Question

Predict the product for the following reaction sequence. PhP CHACH-CH-CH-Li CHCCHỊCH ether or orror он

Answer 1

a ona che, comentar tus douleurs de Ch₂ ch, ch, uh ether Ans-) In the first step, Sn² reaction occurs in which PPhy attacks the -C-Br bond in the reactant and Bro leaues simultaneously. In the second step chach, ch, ch, w. (n-Bu ho) acts as base, and abstracts the most acidic proton de the proton next to op Phy / Ch Ch₂ Ch Chahi n na bat ether. W . Glide - - The product formed in this reaction is called Phosphorous glide In the third step, willig reaction occurs between the Phosphorous glide and the ketone Boon t. c -c-ch, ch, ch-cn-counch, (83 Betaine 1.) 11 Nucleophil'c attack on cart 2.) Formation of a 4 membered ring non perego oxaphosphetane.

3) Formation of alkene chh nb а, — — -и, м, — си.- Сиз со So the final product of the following reaction is D. one