Fig. 4: Straightforward transformation.

a The directing amide group was readily removed by sequential amide reduction to aldehyde and decarbonylation. b The essential alkyne moiety in the product was straightforwardly transformed into Z-alkene and alkane featuring chiral C(sp3)–C(sp2) and C(sp3)–C(sp3) bonds. c Silyl alkyne was easily converted to terminal alkyne, thus providing valuable chiral building blocks.