2,3-dichloropropanoyl chloride

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

Procedure: Part A: To a stirred, cooled (0° C.) solution of 463 mg (1.0 mmol) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-aminobenzyl)pyrazolo[3,4-d]pyrimidin-4-one and 0.28 mL (2.0 mmol) of Et3N in 8 mL of THF was added 0.131 mL (1.2 mmol) of 2,3-dichloropropanoyl chloride. The solution was stirred 0.5 h, warming to ambient temperature. The solution was quenched with water and filtered. The solid was washed with 0.1 N aq. HCl, then water, then 1:1 hexanes-ether. The product was air-dried briefly to afford 390 mg (71%) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-(2-chloroacrylamido)benzyl)pyrazolo[3,4-d]pyrimidin-4-one as an amorphous solid. 1H NMR (300 MHz, DMSO) δ 12.49(br. s, 1H); 10.14(br. s, 1H); 7.97(s, 2H); 7.53(d, 2H, J=8.4 Hz); 7.22(d, 2H, J=8.4 Hz); 6.36(d, 1H, J=2.6 Hz); 6.03(d, 1H, J=2.5 Hz); 3.82(s, 2H); 3.18-3.32(m, 1H); 1.28(d, 6H, J=7.0 Hz). The solution was quenched with water filtered The solid was washed with 0.1 N aq. HCl The product was air-dried briefly

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

Procedure: Part A: To a stirred, cooled (0° C.) solution of 463 mg (1.0 mmol) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-aminobenzyl)pyrazolo[3,4-d]pyrimidin-4-one and 0.28 mL (2.0 mmol) of Et3N in 8 mL of THF was added 0.131 mL (1.2 mmol) of 2,3-dichloropropanoyl chloride. The solution was stirred 0.5 h, warming to ambient temperature. The solution was quenched with water and filtered. The solid was washed with 0.1 N aq. HCl, then water, then 1:1 hexanes-ether. The product was air-dried briefly to afford 390 mg (71%) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-(2-chloroacrylamido)benzyl)pyrazolo[3,4-d]pyrimidin-4-one as an amorphous solid. 1H NMR (300 MHz, DMSO) δ 12.49(br. s, 1H); 10.14(br. s, 1H); 7.97(s, 2H); 7.53(d, 2H, J=8.4 Hz); 7.22(d, 2H, J=8.4 Hz); 6.36(d, 1H, J=2.6 Hz); 6.03(d, 1H, J=2.5 Hz); 3.82(s, 2H); 3.18-3.32(m, 1H); 1.28(d, 6H, J=7.0 Hz). The solution was quenched with water filtered The solid was washed with 0.1 N aq. HCl The product was air-dried briefly

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

Procedure: Part A: To a stirred, cooled (0° C.) solution of 463 mg (1.0 mmol) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-aminobenzyl)pyrazolo[3,4-d]pyrimidin-4-one and 0.28 mL (2.0 mmol) of Et3N in 8 mL of THF was added 0.131 mL (1.2 mmol) of 2,3-dichloropropanoyl chloride. The solution was stirred 0.5 h, warming to ambient temperature. The solution was quenched with water and filtered. The solid was washed with 0.1 N aq. HCl, then water, then 1:1 hexanes-ether. The product was air-dried briefly to afford 390 mg (71%) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-(2-chloroacrylamido)benzyl)pyrazolo[3,4-d]pyrimidin-4-one as an amorphous solid. 1H NMR (300 MHz, DMSO) δ 12.49(br. s, 1H); 10.14(br. s, 1H); 7.97(s, 2H); 7.53(d, 2H, J=8.4 Hz); 7.22(d, 2H, J=8.4 Hz); 6.36(d, 1H, J=2.6 Hz); 6.03(d, 1H, J=2.5 Hz); 3.82(s, 2H); 3.18-3.32(m, 1H); 1.28(d, 6H, J=7.0 Hz). The solution was quenched with water filtered The solid was washed with 0.1 N aq. HCl The product was air-dried briefly

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

Procedure: To a stirred solution of 12.8 grams (0.10 mole) of 4-chloroaniline in 85 ml of chloroform was added 8 ml of pyridine. The mixture was cooled to 10° and 16.1 grams (0.10 mole) of 2,3-dichloropropionyl chloride was added dropwise at such a rate that the reaction mixture temperature did not exceed 35°. Upon completion of addition, the reaction mixture was stirred at ambient temperature for 16 hours. The reaction mixture was concentrated under reduced pressure to a solid residue. The solid was slurried with water and collected by filtration. The dried solid was recrystallized from methylcyclohexane-ethyl acetate using silica gel as a decolorant to give 19.7 grams of 2,3-dichloro-N-(4-chlorophenyl)propanamide; mp 127.5°-129°. The mixture was cooled to 10° did not exceed 35° Upon completion of addition The reaction mixture was concentrated under reduced pressure to a solid residue collected by filtration The dried solid was recrystallized from methylcyclohexane-ethyl acetate

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

Procedure: To a stirred solution of 12.8 grams (0.10 mole) of 4-chloroaniline in 85 ml of chloroform was added 8 ml of pyridine. The mixture was cooled to 10° and 16.1 grams (0.10 mole) of 2,3-dichloropropionyl chloride was added dropwise at such a rate that the reaction mixture temperature did not exceed 35°. Upon completion of addition, the reaction mixture was stirred at ambient temperature for 16 hours. The reaction mixture was concentrated under reduced pressure to a solid residue. The solid was slurried with water and collected by filtration. The dried solid was recrystallized from methylcyclohexane-ethyl acetate using silica gel as a decolorant to give 19.7 grams of 2,3-dichloro-N-(4-chlorophenyl)propanamide; mp 127.5°-129°. The mixture was cooled to 10° did not exceed 35° Upon completion of addition The reaction mixture was concentrated under reduced pressure to a solid residue collected by filtration The dried solid was recrystallized from methylcyclohexane-ethyl acetate

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

Procedure: Part A: To a stirred, cooled (0° C.) solution of 463 mg (1.0 mmol) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-aminobenzyl)pyrazolo[3,4-d]pyrimidin-4-one and 0.28 mL (2.0 mmol) of Et3N in 8 mL of THF was added 0.131 mL (1.2 mmol) of 2,3-dichloropropanoyl chloride. The solution was stirred 0.5 h, warming to ambient temperature. The solution was quenched with water and filtered. The solid was washed with 0.1 N aq. HCl, then water, then 1:1 hexanes-ether. The product was air-dried briefly to afford 390 mg (71%) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-(2-chloroacrylamido)benzyl)pyrazolo[3,4-d]pyrimidin-4-one as an amorphous solid. 1H NMR (300 MHz, DMSO) δ 12.49(br. s, 1H); 10.14(br. s, 1H); 7.97(s, 2H); 7.53(d, 2H, J=8.4 Hz); 7.22(d, 2H, J=8.4 Hz); 6.36(d, 1H, J=2.6 Hz); 6.03(d, 1H, J=2.5 Hz); 3.82(s, 2H); 3.18-3.32(m, 1H); 1.28(d, 6H, J=7.0 Hz). The solution was quenched with water filtered The solid was washed with 0.1 N aq. HCl The product was air-dried briefly

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

Procedure: Part A: To a stirred, cooled (0° C.) solution of 463 mg (1.0 mmol) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-aminobenzyl)pyrazolo[3,4-d]pyrimidin-4-one and 0.28 mL (2.0 mmol) of Et3N in 8 mL of THF was added 0.131 mL (1.2 mmol) of 2,3-dichloropropanoyl chloride. The solution was stirred 0.5 h, warming to ambient temperature. The solution was quenched with water and filtered. The solid was washed with 0.1 N aq. HCl, then water, then 1:1 hexanes-ether. The product was air-dried briefly to afford 390 mg (71%) of 1-(2,4,6-trichlorophenyl)-3-isopropyl-6-(4-(2-chloroacrylamido)benzyl)pyrazolo[3,4-d]pyrimidin-4-one as an amorphous solid. 1H NMR (300 MHz, DMSO) δ 12.49(br. s, 1H); 10.14(br. s, 1H); 7.97(s, 2H); 7.53(d, 2H, J=8.4 Hz); 7.22(d, 2H, J=8.4 Hz); 6.36(d, 1H, J=2.6 Hz); 6.03(d, 1H, J=2.5 Hz); 3.82(s, 2H); 3.18-3.32(m, 1H); 1.28(d, 6H, J=7.0 Hz). The solution was quenched with water filtered The solid was washed with 0.1 N aq. HCl The product was air-dried briefly