“…α-Haloketones may undergo two competitive reactions with sodium or potassium cyanide. Nucleophilic addition and intra-molecular substitution lead to 2-cyanooxiranes 235 [ 465 , 466 , 467 , 468 , 469 , 470 , 471 , 472 , 473 , 474 , 475 , 476 , 477 , 478 , 479 ] ( Scheme 70 ).…”