dmso d6 u03b4 ppm 0 84 t 6h 1 24 m 48h 1 50 m 8h 1 96 m 8h 3 63 3 83 m 8h 4 65 s 2h 5 32 m 4h according to the procedure described in example 1 starting from 10 g 45 mmol of 3 methylene 3 5 5 trimethylcyclohexan 1 yl diisocyanate into 200 ml of thf and 12 77 g 99 mmol of octylamine into 100 ml of thf 16 35 g of a white solid are obtained 5 g 10 42 mmol of the solid are reacted with 1 96 g 23 06 mmol of cyanacetic acid and 2 45 g 24 10 mmol of acetic anhydride the reaction mixture is treated as reported in example 1 to obtain 5 51 g of a light yellow solid ir cm u2212 1 3359 3261 3213 2955 2926 2855 1623 13 cnmr dmso d6 u03b4 ppm 13 5 21 7 26 0 27 2 28 4 29 7 30 9 35 0 42 1 46 4 52 3 75 2 151 9 154 6 155 0 160 9 1 hnmr dmso d6 u03b4 ppm 0 75 1 70 m 45h 3 50 3 90 m 7h 4 60 4 85 m 2h according.