An efficient approach was developed for synthesis of 3-tosyloxy-4-hydroxycoumarins under mild conditions by using Koser’s reagents. The reaction tolerated various functional groups, and the products served as useful aromatic building blocks. Additionally, a plausible mechanism via iodonium ylide was proposed, and the oral anticoagulant Warfarin was synthesized in good yield.
开发了一种有效的方法,通过使用Koser试剂在温和条件下合成3-tosyloxy-4-hydroxycoumarins。该反应容许各种官能团,并且产物用作有用的芳族结构单元。另外,提出了通过
碘鎓叶立德的合理机制,并且以高收率合成了口服抗凝剂
华法林。