A cyclic secondary amine equivalent to tetrahydropyrrole. A colorless liquid with a pungent odor. It emits smoke in air. Its boiling point is 88°C. It can be mixed with water in any ratio and is a strong base (base dissociation constant pKb = 2.7). It is found in tobacco and carrot leaves. The simplest method of synthesis is to reduce pyrrole with hydrogen in the presence of a nickel catalyst. It exhibits the properties of an aliphatic secondary amine, like piperidine. It is widely used as a basic raw material in organic synthesis, and the enamine (1-pyrrolidino-1-cyclohexene) obtained by condensing pyrrolidine with ketones is particularly important in synthetic chemistry. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
テトラヒドロピロールに相当する環式第二アミン。刺激臭のある無色の液体。空気中で発煙する。沸点88℃。水と任意の割合でまじり,強塩基性を示す(塩基解離指数pKb=2.7)。タバコやニンジンの葉に存在する。ピロールをニッケル触媒の存在下に水素で還元するのが最も簡便な合成法である。ピペリジンと同様に脂肪族第二アミンの性質を示す。有機合成における基礎的な原料として広く使われているが,とくにピロリジンとケトン類とを縮合させてできるエナミン(1‐ピロリジノ‐1‐シクロヘキセン)は合成化学上きわめて重要である。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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