Expedient Synthesis of Highly Substituted Fused Heterocoumarins
作者:P. Sellès、U. Mueller
DOI:10.1021/ol0362461
日期:2004.1.1
[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.
A general strategy for visible-light decaging based on the quinone <i>cis</i>-alkenyl lock
作者:David P. Walton、Dennis A. Dougherty
DOI:10.1039/c9cc01073d
日期:——
Combining the fast thermal cyclization of o-coumaric acid derivatives with the intramolecular photoreduction of quinones gives new visible-light photoremovable protecting groups absorbing well above 450 nm.