A very simple one‐pot monomethylation of phenanthreneacetic acids 2 or of their methyl esters 1 yields α‐methylphenanthreneacetic acids 3 in good yield. Altematively, the process may be extended to the preparation of the corresponding α‐arylisobutyric acids 4.
The Synthesis of 2'-Ketodihydro-1,2-cyclopentenophenanthrene and Derivatives of Phenanthro [1,2-b] furan
作者:A. L. Wilds
DOI:10.1021/ja01258a050
日期:1942.6
Phenanthrylalkanoic acids, II: Syntheses and Antiinflammatory Activity of 2-, 3- and 9-Phenanthryl- and 9-Chloro-3-phenanthrylacetic Acids
作者:Franco Fernández、Generosa Gómez、Carmen López、Ana Santos、José M. Calleja、Ernesto Cano、José R. López-Suárez
DOI:10.1002/ardp.19883210606
日期:——
reaction to the phenanthryl ketones 1a–d led to the thiomorpholides 2a–d, hydrolysis produced the acids mentioned in the title. An alternative route, of much better yield, was based on the oxythallation of 1a–d to give the methyl arylacetates 4a–d, which were saponified to 3a–d. Among these four acids, only 3b showed an antiinflammatory activity approaching that of Fenbufen.