| abstract |
NEW MATERIAL:The compound of formula I (R 1 is H or 1W28C hydrocarbon group; R 2 O is 2W4C oxyalkylene; n is 1W4). n EXAMPLE: N-hydro-2,12-morpholyl-1,4,7,10-tetraoxacyclododecane. n USE: Alkali metal scavenger, metallic ion separator, etc. It can be produced easily in high yield. n PREPARATION: The objective compound can be produced by the intramolecular cyclization of the azacrown compound of formula II having dihydroxyl group in the presence of a sulfonic acid chloride (e.g. tosyl chloride) and solid alkali metal hydroxide (preferably powdery sodium hydroxide, etc.) preferably in a solvent such as dioxane at 20W100°C. The amounts of the sulfonic acid chloride and the alkali metal hydroxide are preferably 1mol and 3W5mol per 1mol of the starting compound, respectively. n COPYRIGHT: (C)1986,JPO&Japio |