methyl benzenecarboximidate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A neat mixture of benzimidic acid methyl ester (750 mg, 5.56 mmol) and ethyl isocyanate (808 mg, 11.3 mmol) was stirred at 50° C. for 24 h. Excess isocyanate was removed under vacuum to provide the desired product as a colorless viscous oil (1.09 g, 95%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ1.07 (t, J=7.3 Hz, 3H), 3.25 (q, J=7.3 Hz, 2H), 3.87 (s, 3H), 4.97 (br s, 1H), 7.26-7.40 (m, 2H), 7.45 (d, J=7.4 Hz, 1H), 7.69-7.71 (m, 2H). MS, m/z 207=M+1. Excess isocyanate was removed under vacuum

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Benzimidic acid methyl ester hydrochloride (5 g, 29.1 mmol) was partitioned between saturated sodium carbonate solution (200 mL) and diethyl ether (100 mL). The organic layer was dried (MgSO4) and concentrated to provide the desired product as a colorless liquid (3.20 g, 81%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ3.93 (s, 3H), 7.39-7.46 (m, 3H), 7.75 (d, J=1.1 Hz, 2H). The organic layer was dried (MgSO4) concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The methods (1) to (6) will be described more specifically. For example, as the method (1), potassium hydroxide or acetic anhydride is reacted to 2-chloroethylformamide to provide 2-oxazoline, and the case where 2-bromoethylbenzamide is used provides 2-phenyl-2-oxazoline (see, for example Non-patent Document 1). As the method (2), thionyl chloride is reacted to 2-formamide ethanol to provide 2-oxazoline, and N-(2-hydroxyethyl)benzamide is heated with phosphorous pentoxide to provide 2-phenyl-2-oxazoline (see, for example, Non-patent Document 2). As the method (3), benzoic acid and 2-aminoethanol are heated with alumina to provide 2-phenyl-2-oxazoline (see, for example, Non-patent Document 3). As the method (4), benzonitrile and 2-aminoethanol are heated with calcium chloride at 110 to 120° C. to provide 2-phenyl-2-oxazoline (see, for example, Non-patent Document 4 and Patent Document 1). As the method (5), methyl benzimidate and 2-aminoethanol are heated with alumina to provide 2-phenyl-2-oxazoline (see, for example, Non-patent Document 5). Vinylbenzamide is simply heated to provide 2-phenyl-2-oxazoline. As the method (6), N-allylbenzamide is heated with sulfuric acid to provide 5-methyl-2-phenyl-2-oxazoline (see, for example, Non-patent Document 6).

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A neat mixture of benzimidic acid methyl ester (750 mg, 5.56 mmol) and ethyl isocyanate (808 mg, 11.3 mmol) was stirred at 50° C. for 24 h. Excess isocyanate was removed under vacuum to provide the desired product as a colorless viscous oil (1.09 g, 95%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ1.07 (t, J=7.3 Hz, 3H), 3.25 (q, J=7.3 Hz, 2H), 3.87 (s, 3H), 4.97 (br s, 1H), 7.26-7.40 (m, 2H), 7.45 (d, J=7.4 Hz, 1H), 7.69-7.71 (m, 2H). MS, m/z 207=M+1. Excess isocyanate was removed under vacuum

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Benzimidic acid methyl ester hydrochloride (5 g, 29.1 mmol) was partitioned between saturated sodium carbonate solution (200 mL) and diethyl ether (100 mL). The organic layer was dried (MgSO4) and concentrated to provide the desired product as a colorless liquid (3.20 g, 81%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ3.93 (s, 3H), 7.39-7.46 (m, 3H), 7.75 (d, J=1.1 Hz, 2H). The organic layer was dried (MgSO4) concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Benzimidic acid methyl ester hydrochloride (5 g, 29.1 mmol) was partitioned between saturated sodium carbonate solution (200 mL) and diethyl ether (100 mL). The organic layer was dried (MgSO4) and concentrated to provide the desired product as a colorless liquid (3.20 g, 81%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ3.93 (s, 3H), 7.39-7.46 (m, 3H), 7.75 (d, J=1.1 Hz, 2H). The organic layer was dried (MgSO4) concentrated

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Benzimidic acid methyl ester hydrochloride (5 g, 29.1 mmol) was partitioned between saturated sodium carbonate solution (200 mL) and diethyl ether (I100 mL). The organic layer was dried (MgSO4) and concentrated to provide the desired product as a colorless liquid (3.20 g, 81%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ 3.93 (s, 3H), 7.39-7.46 (m, 3H), 7.75 (d, J=1.1 Hz, 2H). The organic layer was dried (MgSO4) concentrated

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Benzimidic acid methyl ester hydrochloride (5 g, 29.1 mmol) was partitioned between saturated sodium carbonate solution (200 mL) and diethyl ether (I100 mL). The organic layer was dried (MgSO4) and concentrated to provide the desired product as a colorless liquid (3.20 g, 81%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ 3.93 (s, 3H), 7.39-7.46 (m, 3H), 7.75 (d, J=1.1 Hz, 2H). The organic layer was dried (MgSO4) concentrated

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A neat mixture of benzimidic acid methyl ester (750 mg, 5.56 mmol) and ethyl isocyanate (808 mg, 11.3 mmol) was stirred at 50° C. for 24 h. Excess isocyanate was removed under vacuum to provide the desired product as a colorless viscous oil (1.09 g, 95%). This material was used without further purification. 1H NMR (400 MHz, CDCl3) δ 1.07 (t, J=7.3 Hz, 3H), 3.25 (q, J=7.3 Hz, 2H), 3.87 (s, 3H), 4.97 (br s, 1), 7.26–7.40 (m, 2H), 7.45 (d, J=7.4 Hz, 1H), 7.69–7.71 (m, 2H). MS, m/z 207=M+1. Excess isocyanate was removed under vacuum