methyl 2-isocyanatopropanoate

Conditions: temp:55.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: L-Alanine methyl ester hydrochloride (6.00 g., 42.99 mmole) was slurried in anhydrous 1,4-dioxane (125 ml.), treated with trichloromethylchloroformate (7.8 ml., 64.66 mmole) and heated at 55° C. for 20.5 hours. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure. The resultant residue was subjected to distillation to afford the desired intermediate 2-isocyanatopropionic acid methyl ester (4.64 g., 83.6% yield) as a clear colorless liquid. B.P. 58° C. (15-20 mm Hg.). 1H-NMR (200 MHz, CDCl3) δppm =1.54, d, J=8 Hz., 3H (--CH3), 3.87, s, 3H (--OCH3), 4.13, q, J=8 Hz., 1H(--CH--CH3), IR(neat) 3000, 2960, 2270, 1745, 1455, 1445, 1385, 1305, 1230, 1110 cm-1. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure The resultant residue was subjected to distillation

Conditions: temp:55.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: L-Alanine methyl ester hydrochloride (6.00 g., 42.99 mmole) was slurried in anhydrous 1,4-dioxane (125 ml.), treated with trichloromethylchloroformate (7.8 ml., 64.66 mmole) and heated at 55° C. for 20.5 hours. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure. The resultant residue was subjected to distillation to afford the desired intermediate 2-isocyanatopropionic acid methyl ester (4.64 g., 83.6% yield) as a clear colorless liquid. B.P. 58° C. (15-20 mm Hg.). 1H-NMR (200 MHz, CDCl3) δppm =1.54, d, J=8 Hz., 3H (--CH3), 3.87, s, 3H (--OCH3), 4.13, q, J=8 Hz., 1H(--CH--CH3), IR(neat) 3000, 2960, 2270, 1745, 1455, 1445, 1385, 1305, 1230, 1110 cm-1. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure The resultant residue was subjected to distillation

Conditions: temp:55.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: L-Alanine methyl ester hydrochloride (6.00 g., 42.99 mmole) was slurried in anhydrous 1,4-dioxane (125 ml.), treated with trichloromethylchloroformate (7.8 ml., 64.66 mmole) and heated at 55° C. for 20.5 hours. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure. The resultant residue was subjected to distillation to afford the desired intermediate 2-isocyanatopropionic acid methyl ester (4.64 g., 83.6% yield) as a clear colorless liquid. B.P. 58° C. (15-20 mm Hg.). 1H-NMR (200 MHz, CDCl3) δppm =1.54, d, J=8 Hz., 3H (--CH3), 3.87, s, 3H (--OCH3), 4.13, q, J=8 Hz., 1H(--CH--CH3), IR(neat) 3000, 2960, 2270, 1745, 1455, 1445, 1385, 1305, 1230, 1110 cm-1. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure The resultant residue was subjected to distillation

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

Procedure: As described example 159, 7-chloro-4-(1-piperazinyl)-2-quinolinamine, 2-isocyanato-propanic acid-methyl ester, and diisopropylethyl amine, are reacted to give the product as a white solid. LC-MS: 392 (M++1). 1H NMR (DMSO-d6) δ 1.30 (d, 3H), 2.96 (br.s, 4H), 3.55 (m, 4H), 3.61 (s, 3H), 4.16 (m, 1H), 6.26 (s, 1H), 6.45 (br.s, 2H), 6.90 (d, 1H), 7.10 (dd, 1H), 7.38 (d, 1H), 7.75 (d, 1H). are reacted

Conditions: temp:55.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: L-Alanine methyl ester hydrochloride (6.00 g., 42.99 mmole) was slurried in anhydrous 1,4-dioxane (125 ml.), treated with trichloromethylchloroformate (7.8 ml., 64.66 mmole) and heated at 55° C. for 20.5 hours. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure. The resultant residue was subjected to distillation to afford the desired intermediate 2-isocyanatopropionic acid methyl ester (4.64 g., 83.6% yield) as a clear colorless liquid. B.P. 58° C. (15-20 mm Hg.). 1H-NMR (200 MHz, CDCl3) δppm =1.54, d, J=8 Hz., 3H (--CH3), 3.87, s, 3H (--OCH3), 4.13, q, J=8 Hz., 1H(--CH--CH3), IR(neat) 3000, 2960, 2270, 1745, 1455, 1445, 1385, 1305, 1230, 1110 cm-1. The excess trichloromethylchloroformate and 1,4-dioxane were removed from the reaction mixture by distillation under slightly reduced pressure The resultant residue was subjected to distillation