Solid-phase synthesis of pyrazolines and isoxazolines with sodium benzenesulfinate as a traceless linker.
[reaction: see text] The preparation of pyrazoline and isoxazoline derivatives with traceless solid-phase sulfone linker strategy is described. Key steps involved in the solid-phase synthetic procedure include (i) sulfinate S-alkylation, (ii) sulfone anion alkylation, (iii) gamma-hydroxy sulfone --> gamma-ketosulfone oxidation, and (iv) traceless product release via elimination-cyclization. A library of 12 pyrazolines and isoxazolines was synthesized.
Chen
Yu
Y
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
Lam
Yulin
Y
Lai
Yee-Hing
YH