Solvent-Free Synthesis of Diphenyl [2-(Aminocarbonyl)-1,2-dihydroisoquinolin-1-yl]phosphonates from Isoquinoline, Isocyanates, and Diphenyl Phosphonate
The 1 : 1 intermediates generated by addition of isoquinoline to isocyanates were trapped by diphenylphosphonate to yield diphenyl [2‐(aminocarbonyl)‐1,2‐dihydroisoquinolin‐1‐yl]phosphonates in good yields under solvent‐free conditions.