Monatshefte fur Chemie p. 71 - 78 (1997)
Update date:2022-08-10
Topics:
Boutome
Hartmann
By condensation of 2,2-difluoro-4-methyl-benzo[d]-1,3,2-2H-dioxaborines(12) with cyano acetic acid derivatives in presence of weak bases, 3-cyano-4-methyl-benzo[b]pyran-2-ones (13) or their 3-cyano-4-methyl-benzo[b]pyran-2-imine precursors (14) are available in satisfactory yields.
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