1: (4-bromo-thiophen-2-yl)-methanol With sodium hydride; dimethyl sulfoxide 1 h; 2: 2-amino-N,N,N-trimethyl-9H-purine-6-ylammonium chloride in dimethyl sulfoxide 1 h; Further stages.;

1.1: 89 percent / NaBH4 / propan-2-ol / 1 h 2.1: NaH; DMSO / 1 h 2.2: 70 percent / dimethylsulfoxide / 1 h View Scheme