vigorous stirring the reaction flask is cooled with ice water to keep the temperature about 10 u00b0 c 15 u00b0 c this stirring is continued for 4 hours after the addition is completed after the 4 hours the phases are allowed to separate and the organic phase is collected the aqueous phase is washed with a small amount of methylene chloride and the methylene chloride solution is added to the already separated organic phase upon removal of the methylene chloride a colorless solid with a strong methacrylic acid smell is left this solid phase is washed several times with water and dried under vacuum at room temperature the product is identified as aminoundecanoic acid methacrylamide by nuclear magnetic resonance and infrared it has a melting point of 52 u00b0 c 53 u00b0 c yield is 25 g 46 percent the entire yielded product is dissolved in 100 cm 3 of methylene chloride under exclusion of moisture 10 cm 3 of thionyl chloride is added to the solution an exothermal reaction is observed upon subsidence of the exothermicity the solution is heated at 50 u00b0 c for 3 hours any remaining thionyl chloride and solvent is removed first by water aspirator vacuum with dry ice cooled condenser in between then by vacuum pump to give a yellow colored liquid the formation of the acid chloride is confirmed by determining the shift of the u03b1 methylene proton from 2 35 ppm to 2 90 ppm in nuclear magnetic resonance the aoid chloride obtained is without further purification dissolved in 70 cm 3 of dry tetrahydrofuran to this solution which is.