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The Zip-reaction: A New Method for the Synthesis of Macrocyclic Polyaminolactams The 21- and 25-membered aminolactams 11 and 25 were synthesized from the 13-membered lactam 4 . To introduce the ring enlargement unit (a propylamino group) 4 was N-alkylated using acrylonitrile and the resulting product hydrogenated. Repetition of this reaction sequence gave 3 , which was converted in the presence of base in 90% yield to the ring-enlarged macrocyclic base 11 (Scheme 2). In a similar but stepwise synthesis consisting of two separate ring-enlargement reactions 4 was transformed to 11 via 13 (Scheme 4). Introducing three ringenlargement units into 4 the 25-membered aminolactam 25 was synthesized in 84% yield (Scheme 5). The mechanism of the ring-enlargement reaction is given in Scheme 3. In comparison to a zip-fastener or zipper this reaction is called “zipreaction”. 相似文献
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M. Jlinski und G. von Knorre 《Fresenius' Journal of Analytical Chemistry》1885,24(1):595-598
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M. Ilinski und G. von Knorre 《Fresenius' Journal of Analytical Chemistry》1886,25(1):406-410
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K. Hinsberg 《Fresenius' Journal of Analytical Chemistry》1955,146(3):230-231
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