N,N-bis(2-chloroethyl)benzenesulfonamide

Conditions: temp:27.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 5-aminobenzofuran-2-carboxylate (200 g) and N-benzenesulfonyl-N,N-bis(2-chloroethyl)amine (289 g) were added to tributyl amine (1012 ml) under stirring at 25-30° C. The resulting mixture was heated to 73-77° C., followed by stirring for 43 hours at the same temperature. The reaction mass was cooled to 25-30° C., followed by the addition of methanol (506 ml) and then stirring for 30 minutes at 25-30° C. The resulting mass was filtered, washed with chilled methanol (200 ml) and then dried to produce 220 g of methyl 5-[4-(benzenesulfonyl)-1-piperazinyl]benzofuran-2-carboxylate as a fine powder (Purity by HPLC: 99.5%). The resulting mixture was heated to 73-77° C. by stirring for 43 hours at the same temperature The reaction mass was cooled to 25-30° C. stirring for 30 minutes at 25-30° C The resulting mass was filtered washed with chilled methanol (200 ml) dried

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 5-aminobenzofuran-2-carboxylate (200 g) and N-benzenesulfonyl-N,N-bis(2-chloroethyl)amine (289 g) were added to tributyl amine (1012 ml) under stifling at 25-30° C. The resulting mixture was heated to 73-77° C., followed by stirring for 43 hours at the same temperature. The reaction mass was cooled to 25-30° C., followed by the addition of methanol (506 ml) and then stirring for 30 minutes at 25-30° C. The resulting mass was filtered, washed with chilled methanol (200 ml) and then dried to produce 220 g of methyl 5-[4-(benzenesulfonyl)-1-piperazinyl]benzofuran-2-carboxylate as a fine powder (Purity by HPLC: 99.5%). under stifling at 25-30° C The reaction mass was cooled to 25-30° C. stirring for 30 minutes at 25-30° C The resulting mass was filtered washed with chilled methanol (200 ml) dried

Conditions: temp:27.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 5-aminobenzofuran-2-carboxylate (200 g) and N-benzenesulfonyl-N,N-bis(2-chloroethyl)amine (289 g) were added to tributyl amine (1012 ml) under stirring at 25-30° C. The resulting mixture was heated to 73-77° C., followed by stirring for 43 hours at the same temperature. The reaction mass was cooled to 25-30° C., followed by the addition of methanol (506 ml) and then stirring for 30 minutes at 25-30° C. The resulting mass was filtered, washed with chilled methanol (200 ml) and then dried to produce 220 g of methyl 5-[4-(benzenesulfonyl)-1-piperazinyl]benzofuran-2-carboxylate as a fine powder (Purity by HPLC: 99.5%). The resulting mixture was heated to 73-77° C. by stirring for 43 hours at the same temperature The reaction mass was cooled to 25-30° C. stirring for 30 minutes at 25-30° C The resulting mass was filtered washed with chilled methanol (200 ml) dried

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 5-aminobenzofuran-2-carboxylate (200 g) and N-benzenesulfonyl-N,N-bis(2-chloroethyl)amine (289 g) were added to tributyl amine (1012 ml) under stifling at 25-30° C. The resulting mixture was heated to 73-77° C., followed by stirring for 43 hours at the same temperature. The reaction mass was cooled to 25-30° C., followed by the addition of methanol (506 ml) and then stirring for 30 minutes at 25-30° C. The resulting mass was filtered, washed with chilled methanol (200 ml) and then dried to produce 220 g of methyl 5-[4-(benzenesulfonyl)-1-piperazinyl]benzofuran-2-carboxylate as a fine powder (Purity by HPLC: 99.5%). under stifling at 25-30° C The reaction mass was cooled to 25-30° C. stirring for 30 minutes at 25-30° C The resulting mass was filtered washed with chilled methanol (200 ml) dried