Hydrochloric Acid → HCID 22725859, compound

Participants

Reaction Conditions

Reaction Steps

2.0 g (3.56 mmol) of 9-bromo—N-(2,6-diisopropylphenyl)perylene-3,4-dicarboximide (prepared in analogy to Example 6a of WO 96/22 332 using N-(2,6-diisopropylphenyl)perylene-3,4-dicarboximide from Example 28 of WO 97/22 607 as starting material) was dissolved in 500 ml of a mixture of one part by volume of absolute tetrahydrofuran (THF) and one part by volume of dry piperidine under inert gas, admixed in succession with 4 mol % of Pd(PPh3)4 (164 mg, 0.14 mmol), 5 mol % of CuI (32 mg, 0.18 mmol) and 1.14 g (7.12 mmol) of 6-acetoxy-1-hexyne; this mixture was slowly heated to 70° C. and held at this temperature for 1 h. After cooling to room temperature, the reaction mixture was added to three times the volume of a mixture of ice and concentrated hydrochloric acid in a volume ratio of 3:1, the organic phase was separated off, the aqueous phase was extracted with 3 times 200 ml of methylene chloride, the combined organic extracts were dried over magnesium sulfate and the solvent was removed under reduced pressure. Chromatography on silica gel using methylene chloride as eluent gave 1.98 g (90%) of N-(2,6-diisopropylphenyl)-9-(6-acetoxy-1-hexynyl)perylene-3,4-dicarboximide as a red powder having a melting point >300° C.

Provenance & Evidence