Lawesson's reagent → N-(2-chlorophenyl)-N-methyl-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2-carbothioamide

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Reaction Conditions

Reaction Steps

To a suspension of N-(2-chlorophenyl)-N-methyl-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2-carboxamide 157 (60 mg, 0.16 mmol) in dry toluene (2 mL) in a 20 mL scintillation vial was added Lawesson's reagent (4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide, 49 mg, 0.12 mmol, 0.75 equiv). The vial was sealed and heated at 90° C. for 36 hr. The mixture was cooled to room temperature, concentrated and purified by reverse phase HPLC to give 123 as a yellow solid. 1H NMR (CDCl3) δ 7.57 (m, 1H), 7.48 (m, 1H), 7.35-7.27 (m, 4H), 7.14 (m, 1H), 6.96 (m, 1H), 6.52 (s, 1H), 4.19 (m, 2H), 3.80 (s, 3H), 2.92 (m, 2H). MS: (ESI+) 386.1

Provenance & Evidence