The high utility of 2,4,6-trichlorophenyl formate, a highly reactive and easily accessible crystalline CO surrogate, is demonstrated. The decarbonylation with NEt₃ to generate CO proceeded rapidly at rt, thereby allowing external-CO-free Pd-catalyzed carbonylation of aryl/alkenyl halides and triflates. The high reactivity of the CO surrogate enabled carbonylation at rt and significantly reduced the quantities of formate to near-stoichiometric levels. The obtained trichlorophenyl esters can be readily converted to a variety of carboxylic acid derivatives in high yields.

中文翻译：

---

三氯苯基甲酸酯：高活性和易于获得的结晶CO替代物，用于钯催化的芳基/烯基卤化物和三氟甲磺酸酯的羰基化反应

证明了2,4,6-三氯苯基甲酸的高实用性，这是一种高反应性且易于获得的结晶CO替代物。用NEt ₃脱羰以生成CO在室温下迅速进行，从而实现了无外部CO-Pd催化的芳基/烯基卤化物和三氟甲磺酸酯的羰基化反应。CO替代物的高反应活性可实现rt处的羰基化，并将甲酸的量显着降低至接近化学计量的水平。所获得的三氯苯基酯可以容易地以高收率转化为多种羧酸衍生物。