dipropyl carbonate

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

Procedure: Methylhydrazine (7.2 g, 0.16 mole) and di-n-propylcarbonate (5 g, 0.034 mole) were stirred at room temperature for 96 hours to yield 1-methyl-1-propoxycarbonyl hydrazine and 2-methyl-1-propoxycarbonyl hydrazine in approximately equal amounts. The reaction was concentrated in vacuo and fractionated (F1, 2.0 g, 72°-76° a/0.8 mm Hg; F2, 1.1 g, 76°-88° a/0.8 mm Hg; F3, 1.1 g, 88°-90° a/0.8 mm Hg). F1 was a mixture of 1-methyl-1-propoxycarbonyl hydrazine and 2-methyl-1-propoxycarbonyl hydrazine in 4 to 1 ratio. F2 was an equal mixture of 1-methyl-1-propoxycarbonyl hydrazine and 2-methyl-1-propoxycarbonyl hydrazine. F3 was mostly 2-methyl-1-propoxycarbonyl hydrazine. Thus the yield of 1-methyl-1-propoxycarbonyl hydrazine was ca. 46%.

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

Procedure: Methylhydrazine (7.2 g, 1.16 mole) and di-n-propylcarbonate (5 g, 0.034 mole) were stirred at room temperature for 96 hours to yield 1-methyl-1-propoxycarbonyl hydrazine and 2-methyl-1-propoxycarbonyl hydrazine in approximately equal amounts. The reaction was concentrated in vacuo and fractionated (F1, 2.0 g, 72°-76° a/0.8 mm Hg; F2, 1.1 g, 76°-88° a/0.8 mm Hg; F3, 1.1 g, 88°-90° a/0.8 mm Hg). F1 was a mixture of 1-methyl-1-propoxycarbonyl hydrazine and 2-methyl-1-propoxycarbonyl hydrazine in 4 to 1 ratio. F2 was an equal mixture of 1-methyl-1-propoxycarbony hydrazine and 2-methyl-1-propoxycarbonyl hydrazine. F3 was mostly 2-methyl-1-propoxycarbonyl hydrazine. Thus the yield of 1-methyl-1-propoxycarbonyl hydrazine was ca. 46%.