Tris(methylthio)methyl methyl sulfate → 3-[bis(methylthio)methylene]-1-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)quinoline-2,4(1H,3H)-dione

Participants

Reaction Conditions

Reaction Steps

A solution of the product of Example 350B (0.6 g, 1.96 mmol) in acetic acid:pyridine (5:1, 15 mL) was treated with tris(methylthio)methyl methyl sulfate (prepared using the procedures in Synthesis, 22-25, 1988; M. Barbero, S. Cadamuro, I. Degani, R. Fochi, A. Gatti, V. Regondi)(1.6 g, 3 eq.) and heated at 100° C. for 2 hours. The reaction mixture was treated with ice, and the precipitated solids were filtered and dried in vacuum to give 0.53 g (66%) of the title compound. 1H NMR (300 MHz, DMSO-d6) δ 2.63 (s, 6H), 7.34 (m, 1H), 7.55 (d, 1H), 7.61 (m, 1H), 8.08 (m, 5H). MS (DCI+) m/z 411 (M+H)+.

Provenance & Evidence