A highlyefficient one‐pot procedure for the preparation of 1‐chloroalkynes and 1‐chlorobutadiynes from terminal and trialkylsilyl‐protected precursors is reported. This convenient reaction, proceeding under mild conditions, utilizes N‐chlorosuccinimide as the chlorinating agent and tolerates a range of functional groups.
A regiodivergent nickel-catalyzed hydrocyanation of 1-aryl-4-silyl-1,3-diynes is reported. When appropriate bisphosphine and phosphine–phosphite ligands are applied, the same starting materials can be converted into two different enynyl nitriles with good yields and high regioselectivities. The DFT calculations unveiled that the structural features of different ligands bring divergent alkyne insertion