text: Trimethylsilyldiazomethane is deprotonated by butyllithium:
  :(CH)SiCHN  +  BuLi   →   (CH)SiCLiN  +  BuH
  The lithio compound is versatile. From it can be prepared other trimethylsilyldiazoalkanes:
  :(CH)SiCLiN  +  RX   →   (CH)SiCRN  +  LiX
  (CH)SiCLiN reacts with ketones and aldehydes to give, depending on the substituents, acetylenes.