tert-butyl 3-amino-3-phenylpropanoate

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 10 g of 4-phenylazetidin-2-one and 15.2 g of chlorotrimethylsilane in 150 cm3 of anhydrous tert.-butanol are refluxed for 7 days. The solution is then evaporated and ethyl acetate and aqueous sodium bicarbonate at 5% are added. The organic phase is washed with water, dried on sodium sulphate and is then evaporated. 7 g of tert.- butyl 3-phenyl-3-amino-propanoate are obtained (yield 47%). The solution is then evaporated ethyl acetate and aqueous sodium bicarbonate at 5% are added The organic phase is washed with water dried on sodium sulphate is then evaporated

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: With continued reference to Scheme G, 5-(3-tert-Butoxycarbonylamino-propylcarbamoyl)-thiophene-2-carboxylic acid (200 mg, 0.704 mmol) was reacted with 3-Amino-3-phenyl-propionic acid tert-butyl ester (187 mg, 0.845 mmol) in 4.0 ml of anhydrous DMF using HATU (321 mg, 0.845 mmol) with 2,4,6-collidine (0.25 ml, 2.112 mmol), chromatographied on silica gel using ethyl acetate: hexane (8:2) to give 200 mg (58% yield) of the desired product as a clear semi-solid oil. 1H NMR (400 Mhz, CDCl3) 1.3 (s, 9H), 1.45 (s, 9H), 1.7 (m, 2H), 2.9 (ddd, 2H), 3.25 (m, 2H), 3.5 (q, 2H), 4.85 (bs, 1H), 5.55 (m, 1H), 7.23 (m, 1H), 7.33 (m, 4H), 7.4-7.6 (m, 4H).

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: With continued reference to Scheme G, 5-(3-tert-Butoxycarbonylamino-propylcarbamoyl)-thiophene-2-carboxylic acid (200 mg, 0.704 mmol) was reacted with 3-Amino-3-phenyl-propionic acid tert-butyl ester (187 mg, 0.845 mmol) in 4.0 ml of anhydrous DMF using HATU (321 mg, 0.845 mmol) with 2,4,6-collidine (0.25 ml, 2.112 mmol), chromatographied on silica gel using ethyl acetate: hexane (8:2) to give 200 mg (58% yield) of the desired product as a clear semi-solid oil. 1H NMR (400 Mhz, CDCl3) 1.3 (s, 9H), 1.45 (s, 9H), 1.7 (m, 2H), 2.9 (ddd, 2H), 3.25 (m, 2H), 3.5 (q, 2H), 4.85 (bs, 1H), 5.55 (m, 1H), 7.23 (m, 1H), 7.33 (m, 4H), 7.4-7.6 (m, 4H).

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 10 g of 4-phenylazetidin-2-one and 15.2 g of chlorotrimethylsilane in 150 cm3 of anhydrous tert.-butanol are refluxed for 7 days. The solution is then evaporated and ethyl acetate and aqueous sodium bicarbonate at 5% are added. The organic phase is washed with water, dried on sodium sulphate and is then evaporated. 7 g of tert.- butyl 3-phenyl-3-amino-propanoate are obtained (yield 47%). The solution is then evaporated ethyl acetate and aqueous sodium bicarbonate at 5% are added The organic phase is washed with water dried on sodium sulphate is then evaporated

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir: