1: 1.) NCS, 2.) EtN(i-Pr)2 / 1.) DMF, r.t., 16 h, 2.) 5 h 2: K2CO3, ClCH2COOH / methanol / Ambient temperature View Scheme

1: 1.) NCS, 2.) EtN(i-Pr)2 / 1.) DMF, r.t., 16 h, 2.) 5 h 2: K2CO3, ClCH2COOH / methanol / Ambient temperature 3: NaOH / methanol / Ambient temperature View Scheme