Cyclopropanecarbonyl chloride → 4-Chloro-2-(4-cyclopropanecarbonyl-piperazin-1-yl)-6-methyl-10,10-dioxo-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]cycloheptene-8-carboxylic acid

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Reaction Steps

A solution of cyclopropyl carbonyl chloride (0.22 mL, 2.4 mmol) in dichloromethane (2 mL) was added to a suspension of Example 104k (0.35 g, 0.8 mmol) in pyridine (3 mL)/dichloromethane (1 mL) at 10° C. The reaction mixture was stirred for 45 min, concentrated, treated with chilled water and dilute HCl to pH 6. The precipitated solid was filtered and dried to obtain the title compound. Yield: 0.372 g, (91.5%); 1H NMR (DMSO-d6): δ 0.76 (m, 4H, 2CH2); 2.06 (m, 1H, CH); 2.68 (s, 3H, CH3); 3.24 (s, 2H, CH2); 3.32 (s, 2H, CH2); 3.64 (s, 2H, CH2); 3.84 (s, 2H, CH2); 5.15 (s, 2H, CH2); 7.12 (d, 1H, Ar); 7.2 (d, 1H, Ar); 8.1 (s, 1H, Ar); 8.2 (s, 1H, Ar); 8.38 (s, 1H, OH). MS: m/e (ES+) 532 (M+1).

Provenance & Evidence