A convenient and highly efficient Pd-catalysed carbonylative annulation of salicylaldehydes with benzyl chlorides to afford the corresponding 3-arylcoumarins in good to excellent yields has been developed. Importantly, the protocol utilizes a commercially available, low cost, solid and easy to handle N-formylsaccharin as an alternative to the highly toxic CO gas.

中文翻译：

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使用N-甲酰基糖精作为CO替代物，钯催化水杨醛与苄基氯的羰基环化†

已经开发了方便且高效的Pd催化的水杨醛与苄基氯的羰基环化，以良好至优异的产率提供相应的3-芳基香豆素。重要的是，该方案利用可商购的，低成本，固体且易于处理的N-甲酰基糖精作为高毒性CO气体的替代品。