A short facile synthesis of the fungal metabolite (+/-)-3,4-dihydro-3,6,8-trihydroxy-3-pentadecylisocoumarin (peniolactol) has been achieved. Condensation of hexadecanoyl chloride with 3,5-dimethoxyhomophthalic acid afforded 6,8-dimethoxy-3-pentadecylisocoumarin, which on sequential saponification and demethylation furnished rac-peniolactol in 31% overall yield. The ring-chain tautomerism was studied in solution by H-1 NMR and the mass fragmentation pattern. 3-Pentadecylisocoumarin was also synthesized and saponified to the corresponding keto acid as a model compound for comparative studies.
A short facile synthesis of the fungal metabolite (+/-)-3,4-dihydro-3,6,8-trihydroxy-3-pentadecylisocoumarin (peniolactol) has been achieved. Condensation of hexadecanoyl chloride with 3,5-dimethoxyhomophthalic acid afforded 6,8-dimethoxy-3-pentadecylisocoumarin, which on sequential saponification and demethylation furnished rac-peniolactol in 31% overall yield. The ring-chain tautomerism was studied in solution by H-1 NMR and the mass fragmentation pattern. 3-Pentadecylisocoumarin was also synthesized and saponified to the corresponding keto acid as a model compound for comparative studies.
Synthesis of some 3-aryl-1<i>H</i>-isochromene-1-thiones
作者:Aamer Saeed、Zaman Ashraf
DOI:10.1002/jhet.5570450307
日期:2008.5
A rapid microwave-accelerated thionation of some 3-substitued isocoumarins to corresponding 1-thio-isocoumarins was achieved employing Lawesson's reagent under solventless conditions.
Efficient synthesis of some 3-arylisoquinolin-1(2H)-ones
作者:Aamer Saeed、Zaman Ashraf
DOI:10.1007/s10593-008-0140-3
日期:2008.8
A number of 3-arylisoquinolin-1(2H)-ones were efficiently prepared from the corresponding 3-arylisocoumarins by refluxing with methanamide.
KAJI H.; YAMADA M.; NOZAWA K.; KAWAI K.; NAKAJIMA S., ORG. PREP. AND PROCED. INT., 18,(1986) N 4, 253-262
作者:KAJI H.、 YAMADA M.、 NOZAWA K.、 KAWAI K.、 NAKAJIMA S.
DOI:——
日期:——
A Short Total Synthesis of rac -Peniolactol
作者:Aamer Saeed
DOI:10.1007/s00706-002-0515-6
日期:2003.2.1
A short facile synthesis of the fungal metabolite (+/-)-3,4-dihydro-3,6,8-trihydroxy-3-pentadecylisocoumarin (peniolactol) has been achieved. Condensation of hexadecanoyl chloride with 3,5-dimethoxyhomophthalic acid afforded 6,8-dimethoxy-3-pentadecylisocoumarin, which on sequential saponification and demethylation furnished rac-peniolactol in 31% overall yield. The ring-chain tautomerism was studied in solution by H-1 NMR and the mass fragmentation pattern. 3-Pentadecylisocoumarin was also synthesized and saponified to the corresponding keto acid as a model compound for comparative studies.