Regioselective Synthesis of Highly Functionalized Arylphosphonates by Cyclocondensation of 1,3-Bis(trimethylsilyloxy)buta-1,3-dienes with 3-Ethoxy-2-phosphonylalk-2-en-1-ones
Highly functionalized arylphosphonates were prepared by TiCl 4 -mediated cyclocondensation of 3-ethoxy-2-phosphonylalk-2-en-1-ones with 1,3-bis(trimethylsilyloxy)buta-1,3-dienes.