Question

15. H.Pd 16. 17. 17. H3C 1) NaNH, 2) CH CH,Br 3) Lindlar's H2 18. 1) KMnO4(aq) warm, OH 2) H30+ 19. -CH3 excess Br? 20. 1) 1 equiv. HBr. peoxides 2) HCI

Answer 1

15. This is an example of an alkene addition reaction which called catalytic hydrogenation.In a hydrogenation reaction, two hydrogen atoms are added across the double bond of an alkene, resulting in a saturated alkane.

16. This is a hydroboration of Alkenes. Hydroboration-oxidation transforms alkenes into alcohols. It performs the net addition of water across an alkene. Note that the oxygen is always attached at the less substituted carbon (anti-Markovnikoff).

17. This is the nucleophilic substitution in presence of soda amide and alkyl halide. Later in presence of lindlars catalyst gives cis alkene selectively.

18. This is a type of an oxidation reaction in presence of KMnO4 which gives cis diols. Which follows pinacol pinacolon rearrangement in presence of acid.

15. H2.Pd Catalytic Hydrogenation " my "com my ment 1.BH3 16. 2.H202, NaOH Но й NaNH2 Br 17. EH + -a : Na - Lindlar catalyst Pd, CaCO3 A cis alkene KMnO4 (aq) wam, OH 18. OH OH Pinacol Pinacolon Rearrangement Real