Scheme-2. Synthetic scheme for preparation of NOSH-Sulindac (AVT-18A).
a. TBDMSCl/Imidazole, DCM, 18h; b. 4-bromobutyric acid,DCC/DMAP, DCM, rt, 6h; c. AgNO3/acetonitrile, 70°C, 6h; d. NaH2PO4, H2O2/NaClO2, 0°C, 2h; e. ADT-OH, DCC/DMAP, DCM, rt, 6h; f. TBAF/AcOH, THF, 30 min; g. Sulindac, DCC/DMAP, DCM, rt, 6h.