Study on the electrophilic tellurolactonization of 1,2-allenic phosphonates: A facile and efficient synthesis of 4-(Phenyltelluro)-1,2-oxaphosphol-3-ene 2-oxides

摘要

The electrophilic cyclization of 1,2-allenic phosphonates with in-situ-generated PhTeX to afford 4-(phenyltelluro)-2-methoxy-2,5-dihydro[1,2]-oxaphosphole 2-oxides was studied. Good yields were observed when PhTeBr was used as the electrophilic reagent. The stereochemistry of the reaction is also discussed in the paper.