... C-10], [C-11] and [O-14], [O-15] reveals a problem that arises in the oxygen-labeling of CO, where labelled O2 is ... Reaction condition: (a) HOCH2(CH2)4CH2Cl, NaH, n-Bu4N+I-, THF, 25 oC, 48 h, (b) 1-methylimidazole, 100 oC, 3 day, (c) NaBF4 ... 2. Kim DW, Choe YS, Chi DY. ...