反应详情

The title compounds were prepared from Isomers A and B of tert-Butyl 4-hydroxy-2-(4-methyl-5-oxo-2,5-dihydrofuran-3-yl)-1-oxo-2,8-diazaspiro[4.5]decane-8-carboxylate, respectively, using TFA in a similar fashion as described previously for I-19. Isomer A: LC/MS: [(M+1)]+=267; Isomer B: LC/MS: [(M+1)]+=267.