1: 4-nitro-aniline With hydrogenchloride; sodium nitrite in water Diazotization; 2: bis-(cyanomethyl)-sulfone With sodium acetate in ethanol; water T=20°C; Japp-Klingemann reaction; pH=8.3; 0.5 h;

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(i) aq. NaNO2, HCl, (ii) /BRN= 1859995/, aq. NaOH, MeOH, (iii) aq. HCl; Multistep reaction;

(i) aq. NaNO2, HCl, (ii) /BRN= 1865331/, aq. NaOH, MeOH, (iii) aq. HCl; Multistep reaction;

in Loesung vom pH 6;