1: 3-Iodo-azetidine-1-carboxylic acid tert-butyl ester With chloro-trimethyl-silane; ethylene dibromide; zinc in N,N-dimethyl-formamide T=20 - 70°C; 2.16667 h; 2: 3-benzyloxy-iodobenzene With tris-(dibenzylideneacetone)dipalladium(0); trifuran-2-yl-phosphane in N,N-dimethyl-formamide T=70°C; 4 h;