イソシアノ酢酸エチル 化学特性,用途語,生産方法
外観
無色～黒色, 液体
溶解性
エタノール、アセトン及びジエチルエーテル等の有機溶媒と任意の割合で混和するが、水にほとんど溶けない。
用途
有機合成用試薬。
化学的特性
Light yellow to brom liquid. Slightly soluble in water and lye, miscible in ethanol and ether.
使用
Ethyl Isocyanoacetate, is a cyclization synthon used to prepare pyrroles, oxazolines, benzodiazepines, oxazoles and imidazoles. Ethyl isocyanoacetate can be used to prepare pyrroles,1,2 oxazolines, benzodiazepines, oxazoles and imidazoles.
製造方法
synthesis of ethyl isocyanoacetate
A solution containing N-formyl glycine ethyl ester (1, 1.31 g, 10 mmol), DIPEA (2.62 g, 20 mmol) and DMAP (0.45 g, 3 mmol) in dry DCM (10 mL) was loaded in a sample loop and combined with a second stream containing triphosgene (2, 0.98 g, 3.3 mmol) also dissolved in dry DCM (10 mL) at individual channel flow rates of 0.5 mL/min. The combined stream was directed into two linked 10 mL FEP reactor vessels to achieve a 20 minutes residence time at ambient temperature. The output was collect and the solvent was carefully evaporated to 80% of its total volume. The crude material was filtered through silica (5 g) and washed with DCM (2 × 10 mL) to obtain the salt-free product. The desired product 3 was obtained as dark yellow oil after evaporation of the organic phase (1.03 g, 91 % isolated yield, >97% purity by 1H NMR).
一般的な説明
Material may darken upon storage
イソシアノ酢酸エチル 上流と下流の製品情報
原材料
準備製品