were reacted to give 4 33 g 88 clear colorless liquid bp 79 u00b0 80 u00b0 2 6mm a in a manner similar to that of example 2 a 4 80 g 33 5 mmol of 1 4 7 triazacyclodecane and 4 00 g of dimethylformamide dimethyl acetal were reacted to give 4 67 g 91 of clear colorless liquid bp 96 u00b0 97 5 u00b0 4 0 mm redistillation in a molecular still at 70 u00b0 3 4 mm gave an analytical sample of 1 4 7 triazatricyclo 5 3 1 0 4 11 undecane anal calcd for c 8 h 15 n 3 c 62 71 h 9 78 n 27 42 found c 61 27 h 10 00 n 27 10 an infrared spectrum neat had major absorptions at 3 50 6 83 6 99 7 32 7 38 7 90 8 01 8 28 8 45 8 56 8 70 9 09 9 30 9 65 10 26 10 8 11 4 and 14 8 u03bc the nmr spectrum of this sample at 220 mhz in cdcl 3 tms showed absorptions at u03b44 04 1h s 3 35 2h m 3 17 2h m 3 09 2 91 4h m 2 79 2h m 2 63 2h m 1 97 1h m and 1 09 1h d of pent b in a manner similar to that of example 1 c 1 4 7 triazatricyclo 5 3 1 0 4 11 undecane was obtained from 1 4 7 triazacyclodecane and dimethylformamide dimethyl acetal as a clear colorless liquid bp 71 u00b0 74 u00b0 1 0 mm n d 25 1 5171 and was identified by infrared and.