0 ELkier Sequoia S;A., Lausanne - Printed in The Netherlands ... XVIII *. REACTION OF LITHIUM ALKYNES WITH METHYL DIALKYLBORINATES: THE SYNTHESIS OF Bl-ALKYNYLDIALKYLBOR- ANES ... HERBERT C. BROWN * and JAMES A. SINCLAIR Richard B_ Weiherill Laboratory, Purdue University. West Lafayette, Indiana 47907 (USA) (Received October 12th, 1976) ... The reaction of alkynyllithium reagents with methyl ...