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- W2098020110 abstract "1-Alkyl and 1,8-dialkyl-1,4,8,11-tetraazacyclotetradecanes (alkyl = benzyl or methyl) were synthesised through cis -aminal of cyclam which was obtained by reaction of glyoxal and cyclam. The corresponding trans -aminal was synthesised from the respective linear tetraamine and glyoxal followed by cyclisation using 1,2-dibromoethane. The trans -aminal derivatives cannot be used for preparation of cyclam or its derivatives due to exceptional stability of the aminal bridge. The different reactivity of both cis - and trans -aminals is discussed on the basis of the X-ray structures determined for a series of the cyclam derivatives and could be explained by steric hindrance in the trans -aminals." @default.
- W2098020110 created "2016-06-24" @default.
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- W2098020110 date "2010-06-07" @default.
- W2098020110 modified "2023-09-26" @default.
- W2098020110 title "ChemInform Abstract: Crystal Structures and Reactivity of 3a,5a,8a,10a-Tetraazaperhydropyrene Derivatives. An Alternative Approach to Selective Nitrogen Alkylation of 1,4,8-11-Tetraazacyclotetradecane (Cyclam)." @default.
- W2098020110 cites W2952942909 @default.
- W2098020110 doi "https://doi.org/10.1002/chin.200029126" @default.
- W2098020110 hasPublicationYear "2010" @default.
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