1-benzyl-3-(2-chloroethylamino)pyrrolidine-2,5-dione

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

Procedure: 17.4 g (0.58 mmol) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55). 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55)

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

Procedure: 74.8 g (0.4 mol) of N-benzylmaleimide are reacted with 58 g (0.5 mol) of 2-chloroethylamine hydrochloride and 50.5 g (0.5 mol) of triethylamine in accordance with the working instructions of Example Ia. After working up by chromatography, 81.6 g (77% of theory) of an oil with an RF value of 0.24 (on silica gel using ethyl acetate:petroleum ether=1:1) are obtained. are obtained

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

Procedure: 17.4 g (0.58 mmol) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55). 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55)

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

Procedure: 17.4 g (0.58 mmol) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55). 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55)

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

Procedure: 74.8 g (0.4 mol) of N-benzylmaleimide are reacted with 58 g (0.5 mol) of 2-chloroethylamine hydrochloride and 50.5 g (0.5 mol) of triethylamine in accordance with the working instructions of Example Ia. After working up by chromatography, 81.6 g (77% of theory) of an oil with an RF value of 0.24 (on silica gel using ethyl acetate: petroleum ether=1:1) are obtained. are obtained

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

Procedure: 17.4 g (0.58 mmol) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55) 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55) 57.7 g of product (56% of theory) are isolated

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

Procedure: 17.4 g (0.58 mmol) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55). 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55)

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

Procedure: 74.8 g (0.4 mol) of N-benzylmaleimide are reacted with 58 g (0.5 mol) of 2-chloroethylamine hydrochloride and 50.5 g (0.5 mol) of triethylamine in accordance with the working instructions of Example Ia. After working up by chromatography, 81.6 g (77% of theory) of an oil with an RF value of 0.24 (on silica gel using ethyl acetate:petroleum ether=1:1) are obtained. are obtained

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

Procedure: 17.4 g (0.58 mmol ) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55). 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55)

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

Procedure: 74.8 g (0.4 mol) of N-benzylmaleimide are reacted with 58 g (0.5 mol) of 2-chloroethylamine hydrochloride and 50.5 g (0.5 mol) of triethylamine in accordance with the working instructions of Example Ia. After working up by chromatography, 81.6 g (77% of theory) of an oil with an RF value of 0.24 (on silica gel using ethyl acetate: petroleum ether=1:1) are obtained. are obtained

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

Procedure: 17.4 g (0.58 mmol ) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55). 57.7 g of product (56% of theory) are isolated. After the mixture has been left On purification by chromatography, impurities are first eluted with ethyl acetate the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55)

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

Procedure: 74.8 g (0.4 mol) of N-benzylmaleimide are reacted with 58 g (0.5 mol) of 2-chloroethylamine hydrochloride and 50.5 g (0.5 mol) of triethylamine in accordance with the working instructions of Example Ia. After working up by chromatography, 81.6 g (77% of theory) of an oil with an RF value of 0.24 (on silica gel using ethyl acetate: petroleum ether=1:1) are obtained. are obtained