Phthalimide → HCID 178444658, compound

Participants

Reaction Steps

0.68 ml (4.36 mmol) of diethyl azodicarboxylate was slowly added dropwise under argon and while cooling with ice to a solution of 1.95 g (3.35 mmol) of [6-(tert-butyl-diphenyl-silanyloxymethyl)-10-hexyl-phenothiazin-4-yl]-methanol, 876 mg (5.03 mmol) of phthalimide and 968 mg (3.69 mmol) of triphenylphosphine in 25 ml of tetrahydrofuran. The reaction mixture was stirred at 0° for 2 hours and at room temperature for 20 minutes and then worked up analogously to that described in Example 2.1.1 ea. The residue was chromatographed on 250 g of silica gel with diethyl ether/hexane (1:3), whereupon, after precipitation from hexane, 1.74 g (73.1%) of 2-[6-(tert-butyl-diphenyl-silanyloxymethyl)-10-hexyl-phenothiazin-4-ylmethyl]-2,3-dihydro-1H-isoindole-1,3-dione were obtained as a light yellowish amorphous solid. MS: 710 (M+, 100), 653(61), 506(16), 370(36), 308(41), 268(40), 224(21), 160(34), 130(45), 43(43).

Provenance & Evidence