反应条件
in toluene Ar atmosphere, addn. of soln. of amine, shaking (3 min), 20°C (2 d); organic byproduct: 3-ethoxy-4-(fluoren-9-ylidene)-2,2-dimethyl-5-phenyl-3,4-dihydro-2H-pyrrole; decantation, washing of solid (C5H12), chromy. of soln. (silica gel, C5H12/CH2Cl2 (2:1)), crystn. (C5H12, -40°C), sepn. of W(CO)6 (dissolution of solid (CH2Cl2), crystn. (-15°C)), pptn. of tungstate (20°C, C5H12); elem. anal.;
