ðɪs ɹɪˈeɪdʒənt ɪz wˈaɪdli jˈuːzd fɔːɹ nˌuːklɪəfˈɪlɪk sˌʌbstɪtˈuːʃənz ʌv ɪpˈɑːksaɪdz, ˈælkaɪl hˈælaɪdz ænd ˈælkaɪl sˈʌlfənˌeɪts, æz wˈɛl æz fɔːɹ kˈɑːndʒuːɡˌeɪt ɐdˈɪʃənz tʊ ˈælfə,bˈeɪɾəʌnsˈætʃɚɹˌeɪɾᵻd kˈɑːɹbənˌaɪl kˈɑːmpaʊndz baɪ mˈɛθəl ˈænaɪən.
This reagent is widely used for nucleophilic substitutions of epoxides, alkyl halides and alkyl sulfonates, as well as for conjugate additions to α,β-unsaturated carbonyl compounds by methyl anion.