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Mono- and ditosylated 1,4,7-triazacyclononane (2, 3) were synthesized by rapid partial deprotection of 1,4,7-tritosyl-1,4,7-triazacyclononane (1) in vigorously stirred refluxing acetic acid-hydrobromic acid mixture.
Financial support from the Hungarian National Research Foundation (OTKA T-023810) and Bolyai Scholarship (BO/00452/99) is gratefully acknowledged.
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