2-(1H-pyrrol-2-yl)isoindole-1,3-dione

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of phthalimidopyrrole (748.6 g) and 2,4-dichlorobenzoyl chloride (1109.1 g) in 3.5 L of dichloroethane was added 707.3 g of K-10 Montmorillonite clay. The resulting mixture was stirred at reflux for 48 hrs, then filtered and concentrated to a semisolid. The semisolid was triturated with a large quantity of ether and collected to yield 112.5 g of powder. The ether wash was concentrated to give 162.0 of a residue. This was purified by high performance liquid chromatography (HPLC hereinafter, silica, dichloromethane) and recrystallized from absolute ethanol to yield 37.26 g of crystals, mp 152°-153° C. at reflux for 48 hrs filtered concentrated to a semisolid The semisolid was triturated with a large quantity of ether collected

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of phthalimidopyrrole (748.6 g) and 2,4-dichlorobenzoyl chloride (1109.1 g) in 3.5 L of dichloroethane was added 707.3 g of K-10 Montmorillonite clay. The resulting mixture was stirred at reflux for 48 hrs, then filtered and concentrated to a semisolid. The semisolid was triturated with a large quantity of ether and collected to yield 112.5 g of powder. The ether wash was concentrated to give 162.0 of a residue. This was purified by high performance liquid chromatography (HPLC hereinafter, silica, dichloromethane) and recrystallized from absolute ethanol to yield 37.26 g of crystals, mp 152°-153° C. at reflux for 48 hrs filtered concentrated to a semisolid The semisolid was triturated with a large quantity of ether collected

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of phthalimidopyrrole (748.6 g) and 2,4-dichlorobenzoyl chloride (1109.1 g) in 3.5 L of dichloroethane was added 707.3 g of K-10 Montmorillonite clay. The resulting mixture was stirred at reflux for 48 hrs, then filtered and concentrated to a semisolid. The semisolid was triturated with a large quantity of ether and collected to yield 1112.5 g of powder. The ether wash was concentrated to give 162.0 of a residue. This was purified by high performance liquid chromatography (HPLC hereinafter, silica, dichloromethane) and recrystallized from absolute ethanol to yield 37.26 g of crystals, mp 152°-153° C. at reflux for 48 hrs filtered concentrated to a semisolid The semisolid was triturated with a large quantity of ether collected