[N:1]1[C:9]2[C:4](=[N:5][CH:6]=[C:7]([C:10](O)=[O:11])[CH:8]=2)[S:3][N:2]=1.C(OC(Cl)=O)C(C)C.[BH4-].[Na+]>>[N:1]1[C:9]2[C:4](=[N:5][CH:6]=[C:7]([CH2:10][OH:11])[CH:8]=2)[S:3][N:2]=1The carboxylic acid (iii) (0.82 g) was reacted with isobutylchloroformate and sodium borohydride to afford a semi-solid (0.12 g), after chromatography on silica gel (chloroform).
Wird geladen…