1: Methyl 4-(1-methoxycarbonylpyrrolidin-3-yl)benzoate With hydrogenchloride in methanol; water 40 h; Heating / reflux; 2: 2-(tert-butoxycarbonyloxyimino)-2-phenylacetonitrile With N-ethyl-N,N-diisopropylamine in DMF (N,N-dimethyl-formamide) T=20°C; 15 h;