Hydrochloric Acid → HCID 69978538, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of {6-[3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propoxy]-1,2,3,4-tetrahydro-naphthalen-2-yl}-acetic acid methyl ester, (17.7 g) in isopropyl alcohol (350 mL) heated at 55° C. was added hydrazine (3 mL). The mixture was heated to reflux for 1.5 h, then the reaction mixture was allowed to stand at room temperature overnight. Concentrated HCl (7.8 mL) was added, the mixture was stirred for 10 minutes, and filtered. The white solid was washed with isopropyl alcohol. The filtrate was concentrated under reduced pressure and applied to a silica gel column. Elution with 2% NH4OH/10% MeOH/CH2Cl2 afforded the product of the example as a golden oil which solidified on standing (8.0 g). NMR (300 MHz, CDCl3) δ6.95 (d, J=8.34 Hz, 1H), 6.67 (dd, J=8.30, 2.55 Hz, 1H), 6.62 (d, J=2.16 Hz, 1H), 4.01 (t, J=6.07 Hz, 2H), 3.69 (s, 3H), 2.93 (broad s, 2H), 2.86-2.77 (m, 3H), 2.46-2.36 (m, 3H), 2.26-2.18 (m, 1H), 2.12-1.98 (broad s, 2H), 1.93 (m, 3H), 1.51-1.38 (m, 1H).

Provenance & Evidence