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Beilstein J. Org. Chem. 2023, 19, 1923–1932, doi:10.3762/bjoc.19.143
Graphical Abstract
Scheme 1: Representative [4 + 3] cycloaddition reactions of MBH carbonates derived from isatins.
Scheme 2: Synthesis of spiro[indoline-3,5'-[1,2]diazepines] 3a–m. Conditions: α-halogenated acylhydrazone (0....
Scheme 3: Synthesis of spiro[indoline-3,5'-[1,2]diazepines] 5a–g. Conditions: α-halogenated acylhydrazone (0....
Scheme 4: Synthesis of dihydrospiro[indoline-3,5'-[1,2]diazepines] 7a–n. Conditions: α-halogenated N-tosylhyd...
Figure 1: Single crystal structure of the spiro compound 7a.
Scheme 5: Proposed reaction mechanism.
Scheme 6: Gram-scale synthesis of compound 7c.