“…N -Methylglucamine has been widely used for synthesizing new ionic liquids [ 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 ], always through a direct quaternization of the starting material. This reaction could be performed through a one-pot double alkylation [ 105 , 109 , 112 ], a two steps double alkylation [ 102 , 103 , 104 , 106 , 107 , 108 , 110 ], or a mono alkylation followed by a neutralization reaction [ 106 , 111 ]. The latter approach is very simple, does not require prior protection of the free hydroxyl groups, and therefore, has been used for preparing a variety of ILs.…”