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- W1562336421 abstract "Ethyl 4-oxoalkanoates 1 react at ambient temperature in dry methanol in the presence of molecular sieve 3 Å in almost quantitative yield with 3-aminopropanol and 2-aminoethanol to form the bicyclic lactams rac-2 and rac-3, respectively. Surprisingly, the (±)-5-alkyl-4-oxa-1-azabicyclo[3.3.0]octan-8-ones rac-3a–d dimerize in trichloromethane saturated with 2 N HCl to the ten-membered heterocycles 4a–d. The structures of the substituted 1,6-dioxa-3,8-diazacyclodecanes 4a and 4c have been determined by an X-ray crystal analysis." @default.
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- W1562336421 date "1992-01-13" @default.
- W1562336421 modified "2023-09-25" @default.
- W1562336421 title "Reactions of 4-Oxoalkanoic Acids, 4. Synthesis of (±)-6-Alkyl-5-oxa-1-azabicyclo[4.3.0]nonan-9-ones, (±)-5-Alkyl-4-oxa-1-azabicyclo[3.3.0]octan-8-ones, and Substituted 1,6-Dioxa-3,8-diazacyclodecanes by Reaction of Ethyl 4-Oxoalkanoates with 3-Aminopropanol and 2-Aminoethanol" @default.
- W1562336421 cites W2074140478 @default.
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- W1562336421 doi "https://doi.org/10.1002/jlac.199219920107" @default.
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