ɪspˈɛʃəli ɪmpˈoːɹtənt ɑːɹ ðə fɔːɹmˈeɪʃən ʌv ɔːɹɡˌænoʊkˈɑːpɚ kˈɑːmpaʊndz ɡˈɪlmən ɹɪˈeɪdʒənts, ʌvwˈɪtʃ ðə mˈoʊst jˈuːsfəl ɪz lˈɪθiəm dˈaɪmθɪlkˌʌpɹeɪt.
Especially important are the formation of organocopper compounds (Gilman reagents), of which the most useful is lithium dimethylcuprate.