Synthesis problem for organic chemistry
to get racemic 2,3-dibromobutane from propyne you have to take propyne through 4 steps. I have figured out that Br2 is one of the steps, but what are the other 3 steps to complete this reaction?
2006-07-27 03:06:58 · 3 answers · asked by wsimms20 1 in Science & Mathematics ➔ Chemistry
Propyne must first be reacted with sodium to form the alkynide salt. This can then be reacted with methyl iodide to give 2-butyne. The 2-butyne would have to be converted to 2-butene. Reduction with H2 and Pt under pressure would be adequate. The 2-butene could then be reacted with Br2 to give racemic 2,2-dibromobutane. Please note that the above answer of reacting 2-butyne with HBr will give 2,2-dibromobutane not 2,3-dibromobutane.
2006-07-30 11:53:13 · answer #1 · answered by Richard 7 · 0⤊ 0⤋
Meso-2 3-dibromobutane
2016-11-09 19:43:23 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1st step
CH3Br, NaH or LiNH2 to make 2-Butyne
Now treat with HBr
2006-07-27 03:11:57 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋