Abstract
N‐Alkyl (Me, Et, i‐Pr, t‐Bu)‐substituted phthalimdes 5a–d were easily transformed to 1(2H)‐phthalazinones 8d–i and 2,3‐benzoxazin‐1‐ones 9d, f, and j via a one‐pot addition–decyclization–cyclocondensation process.
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Acknowledgment
This work was supported by Korea Research Foundation Grant (KRF‐2000‐015‐DP0281).