A versatile new strategy for the synthesis of tropolones

✍ Scribed by Martin G. Banwell; René Onrust

• Publisher: Elsevier Science
• Year: 1985
• Tongue: French
• Weight: 209 KB
• Volume: 26
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)88954-6

✦ Synopsis

Pi= Swern-type oxidation of various 7-halogenobicyclo[4.l.O]heptane-2,3-or -3,4- 10 s affords the corresponding bicyclic diketones which undergo in situ ring expansion and loss of hydrogen halide to give a-tropolones in high yieme quantitative conversion of the isolable 1,4-diketone 26 into the y-tropolone acetate 27 has been -achieved.