反应详情

N-butyl-N'-isopropylurea was prepared in a yield of 58% as described in Example 1, but using 2.04 g of N-isopropylurea (20 mmol) as the urea and 2.74 g of butylbromide (20 mmol) as the alkylating agent. 1H-NMR (CDCl3 ; 200 MHz; delta): 5.708 (t; 1H; butyl-NH; JCH2NH =5.5 Hz); 5.490 (d; 1H; isopropyl-NH; JCHNH =7.9 Hz), 3.858 (dq; 1H; isopropyl-CH; JCHNH =7.9 Hz; JCHCH3 =6.5 Hz); 3.135 (dse; 2H; butyl-N--CH2 ; JCH2NH =5.5 Hz; JCH2CH2 =6.7 Hz); 1.498-1.275 (m(tt and tq); 4H; butyl-CH2 --CH2); 1.122 (d; 6H; isopropyl-CH3 ; JCHCH3 = 6.5 Hz); 0.906 (t; 3H; butyl-CH3 ; JCH2CH3 =7.0 Hz) ppm.