Methodological study demonstrates a rapid two-step synthesis of fused heterocoumarins from boronic acids and enol triflates, suggesting broader access to complex coumarin scaffolds.
[reaction: see text] Highly substituted fused coumarins can be prepared in two steps starting from the appropriate boronic acids and enol triflates. The synthesis of fused pyrano[2,3-d]pyrimidin-7-one (1) is a key example to demonstrate the potential of the method in the elaboration of new coumarin scaffolds.
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Sellès et al. (2003) studied this question.
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