1: 18 percent Spectr. / DBU; MgBr2; air / toluene / 36 h / 115 °C 2: 0.220 g / TFA / CH2Cl2 / 1 h / 20 °C View Scheme

1,8-diazabicyclo[5.4.0]undec-7-ene in toluene T=115°C; 36 h; Product distribution / selectivity;

trichlorophosphate T=80°C; Vilsmeier Formylation; 1 h;

1: N,N-dimethyl-formamide With trichlorophosphate T=0°C; 0.166667 h; 2: 2-pyrrolylmethylpyrrole T=0°C; Vilsmeier formylation; 1.5 h; Further stages.;

1: 82 percent / morpholine, sodium borohydride / ethanol; H2O / 6 h / Heating 2: 1.) benzoyl chloride, 4.) sodium carbonate / 1.) 0 deg C, 2 h, 2.) 2 h, r.t., 3.) toluene, 1 h, 4.) aq. ethanol, 15 min, reflux View Scheme

1: 87 percent / 5percent aq. hydrogen peroxide, potassium hydroxide / ethanol / 0.5 h 2: 82 percent / morpholine, sodium borohydride / ethanol; H2O / 6 h / Heating 3: 1.) benzoyl chloride, 4.) sodium carbonate / 1.) 0 deg C, 2 h, 2.) 2 h, r.t., 3.) toluene, 1 h, 4.) aq. ethanol, 15 min, reflux View Scheme

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