Discussion Addendum for: Phosphine-Catalyzed [3 + 2] Annulation: Synthesis of Ethyl 5-(tert-Butyl)-2-phenyl-1-tosyl-3-pyrroline-3-carboxylate

关于膦催化[3+2]环化反应：5-(叔丁基)-2-苯基-1-甲苯磺酰基-3-吡咯啉-3-羧酸乙酯的合成的讨论补充