Question

The acetylide ion attacks the epoxide, opening up the strained, three-membered ring and creating an alkoxide ion. After the reaction is complete, a proton source is used to protonate the alkoxide ion. In a synthesis, these two steps must be shown separately, because the acetylide ion will not survive in the presence of H30t. Using this information, complete the reaction diagram to propose a plausible synthesis for the following compound using acetylene as your only source of carbon atoms: Soep 4 Sep E Steps.G Stgp Step 1: Os04; NMO H2; Lindlar's Catalyst NANH2 Br2 O Get help answering Molecular Drawing questions. Structure of B: ? Edit

Answer 1

mcpba is an epoxidation reagent

He HEECH - HBY BY Lindlar's cat Im.coA NINH2 Br I nar OHH2 Pt NaNHL - =H

Lindlars catalyst reduce the Alkyne into cis alkene.

Addition of HBr by Markonikoff.

Alkylation of terminal Alkyne by SN2 reaction