Question

In each reaction box, place the best reagent and conditions from the list below.

In each reaction box, place the best reagent and conditions from the list below. You are correct that the third step is a reduction of 2-pentyne. But H2 with a platinum catalyst will reduce it to pentane, while you need an alkene for the next step. NaNH H3C OH HO 2) CH3CH2Br CEC H3C CH3. H3C H2, Pt HO 4) KMno 4, NaOH, H20, cold BH3 THF NaOH, H20 Na, NH3 (l) CH3Br NaBH H2, Lindlar's Catalyst CH3CH2CH2Br CH OH Map dan

Answer 1

1. NaNH2

2. CH3-CH2-Br

3. Na, NH3 (l) ----> trans alkene

4. KMnO4, NaOH, H2O cold