Abatnd. 2-Dodccanoyl-3.5~dihydrox -2\_cyclohexen-l-one, identified from the setal exudate of immature andromcda lace bug nymphs, Step hwJ tk takeyai, was synthcsixed. Key s s involved construction of the "E cyclohcxanaiione ring containing a phcn+iimcthylsilyl substitucnt as a masked ydmxyl group.
Synthesis of 2-acyl-3,6-dihydroxy-2-cyclohexen-1-ones
โ Scribed by James E. Oliver; William R. Lusby
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 578 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0040-4020
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โฆ Synopsis
AJntract --Two of the title compounds. recently identified as components of exudates produced by lace bug nymphs of the genus Corythucha. have been synthesized. 2-Acyl-3-hydroxy-2-cyclohexen--l-ones were converted to 3-alkyd-6,7-dihydro-l,P-benzisoxazol-4(W)-ones which were hydroxylated at position 5, then reductively disassembled. Sodium borohydride and nickel chloride in C+F/TH containing 1-octene selectively reduced the isoxazole N-O bond without hydrogenating a side chain double bond.
๐ SIMILAR VOLUMES
In a short sequence, 5-vinyloxazolidin-2-ones were converted into the 3,6-disubstituted 3,6-dihydropyridin-2-ones via Pd-catalysed carbonylation and enolate alkylation with high diastereoselectivity. Alkylation of 6-substituted N-methylpyridin-2ones gives stereoselectively the 3,6-anti diastereoisom
2, carbazol-6-ones 6 were obtained by cyclocondensation of carbazole 1 with malonates 2 in the presence of quinoline. The assignment of the structures of 6 was performed by NMR experiments such as 1D 1 H, 13 C and DEPT, as well as 2D COSY, HSQC, HMBC and 1,1-ADEQUATE spectra.