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- W3015146005 abstract "Ozonized l-trifluoroacetyl-3-pyrroline (2a) and 3-sulfolene (6) were reduced with sodium cyanoborohydride (1) to afford the dialdehyde, which reacted in situ with the primary amines 3a-d in the presence of 1 to give the piperazines 4a-d (21-60%) and the dioxothiomorpholines 7a-d (26-76%). Reduction of 7a and 7c with diisobutylaluminum hydride yielded the thiomorpholines 8a and 8c, respectively. On the other hand, the 9-membered azacrown ethers 10 and 11 were obtained when N, N'-dibenzylethylenediamine (9) was employed. The dioxothiomorpholine derivatives 13 of amino acids were also prepared by the same treatment." @default.
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- W3015146005 date "1987-01-01" @default.
- W3015146005 modified "2023-10-09" @default.
- W3015146005 title "Synthesis of piperazines and thiomorpholines by ozonolysis of cyclic olefins and reductive N-alkylation." @default.
- W3015146005 doi "https://doi.org/10.1271/bbb1961.51.435" @default.
- W3015146005 hasPublicationYear "1987" @default.
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