found c 52 28 h 6 04 n 15 30 c 16 h 22 n 4 o 6 requires c 52 46 h 6 01 n 15 30 diisocyanatohexane 3 5 ml 21 58 mmol 1 eq and 4 methoxyphenol 5 36 g 43 17 mmol 2 0 eq in dichloromethane 50 ml was treated with triethylamine 9 0 ml 64 76 mmol 3 0 eq in a dropwise fashion stirring was continued for 15 hours the white precipitate formed was collected by filtration and washed with dichloromethane 2 u00d7 50 ml and dried in a vacuum desiccator thus the title compound 5 0 g 59 was obtained as a white powder u03b4 h 400 mhz d 6 dmso 1 25 1 42 4h m ch 2 1 45 1 55 4h m ch 2 3 07 4h q br j 6 0 hz ch 2 3 36 6h s ch 3 6 90 4h d j 9 0 hz arh 7 02 4h d j 9 0 hz arh 7 61 2h t br j 6 0 hz nh u03b4 c 100 mhz d 6 dmso 26 3 29 5 40 7 ch 2 55 7 ch 3 114 5 122 9 ch 144 9 155 1 c ipso 156 6 co found c 62 58 h 7 08 n 7 66 c 20 h 28 n 2 o 6 requires c 61 22 h 7 14 n 7 14 diisocyanatohexane 1 0 9 ml 5 57 mmol 1 eq and the phenol 2 1 50 g 10 38 mmol 1 9 eq in dichloromethane 50 ml was treated with triethylamine 2 3 ml 16 69 mmol 3 0 eq in a dropwise fashion stirring was continued.