diethyl ether; phosphorus pentoxide; hydroquinone; 1,2,3-benzenetriol

1: 100 percent / 2,6-di-tert-butyl-4-methylpyridine / CH2Cl2 / 1.5 h / 0 - 20 °C 2: 1.) Pd2(dba)3, Ph3As / 1.) 1-methyl-2-pyrrolidinone, 10 min, 2.) 1-methyl-2-pyrrolidinone, 1 h, RT View Scheme

1: palladium/calcium carbonate; ethanol / Hydrogenation 2: hydroquinone; pyrogallol; diethyl ether; P2O5 View Scheme

tris(dibenzylideneacetone)dipalladium (0); triphenyl-arsane 1.) 1-methyl-2-pyrrolidinone, 10 min, 2.) 1-methyl-2-pyrrolidinone, 1 h, RT; Yield given. Multistep reaction;