MeOH tetrahydrofuran → 128396-57-6

Participants

Reaction Steps

A mixture of 8-[4-[4-(1,2-benzisothiazol-3-yl)-1piperazinyl]butyl]-6-(4-nitro-benzyloxycarboxy)-8-azaspiro [4.5]decane-7,9-dione (1.98 g, 3.12 mmol) and 10% Pd/C (0.75 g) in MeOH-THF (2:1, 30 mL) was hydrogenated in a Parr shaker at 55 psi for 1.5 h. An additional 1.25 g of 10% Pd/C was added and hydrogenation was continued at 55 psi for 1 h. The resulting mixture was filtered through a pad of Celite and the pad was washed with EtOAc. The filtrate was evaporated to give a gum which was purified by flash chromatography (EtOAc) to give the title compound (0.98 g, 69%) as a solid. An analytical sample was crystallized from EtOAc/hexane to give pale yellow crystals, m.p. 151° C.; IR (neat) 3430, 1728, 1673 cm-1 ; 1H NMR (CDCl3) δ 7.90-7.76 (m, 2H), 7.49-7.29 (m, 2H), 4.18 (s, 1H), 3.82-3.69 (m, 2H), 3.59-3.54 (m, 5H), 2.79, 2.52 (AB q, J=17.4 Hz, 2H), 2.75-2.66 (m, 4H), 2.49-2.44 (m, 2H), 2.11-1.98 (m, 1H), 1.74-1.19 (b m, llH);

Provenance & Evidence