Study of Synthesis and Chemistry of 2-Carbonyl-5- methylene-2,5- dihydrofuran and 2-Methylenecyclobutenone
碩士 === 國立中山大學 === 化學學系 === 82 === 2-carbonyl-5-methylene-2,5-dihydrofuran(14) has been synthesized by the flash vacuum pyrolysis method. under pyrulysis condition compound 14 eliminated a CO molecule to give 2-carbena-5-methylene-2,5-dihydr...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1994
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| Online Access: | http://ndltd.ncl.edu.tw/handle/36697489551643613819 |
| Summary: | 碩士 === 國立中山大學 === 化學學系 === 82 === 2-carbonyl-5-methylene-2,5-dihydrofuran(14) has been
synthesized by the flash vacuum pyrolysis method. under
pyrulysis condition compound 14 eliminated a CO molecule to
give 2-carbena-5-methylene-2,5-dihydrofuran(30). The
intermediate 30 then underwent either ring contraction to give
2-methylenecyclobutenone(25) or carbene-carbene rearrangement
followed by elimination of one CO molecule to give 1-buten-3-
yne(26). Compound 14 has also been synthesized by flouride
induced Hoffmann flimination of (5-trimethylsilylmethyl-2-
furyl) acyl chloride(19). The existence of 14 has been proved
by trapping experiments.
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