1: K2CO3 / dimethylformamide 2: (i) NaH, DMSO, (ii) /BRN= 605278/, (iii) /BRN= 102555/, KI, butanone, (iv) HCl, MeOH View Scheme

(i) NaH, DMSO, (ii) /BRN= 605278/, (iii) /BRN= 102555/, KI, butanone, (iv) HCl, MeOH; Multistep reaction;