作者:D. E. Ames、G. Hall、B. T. Warren
DOI:10.1039/j39680002617
日期:——
Several methods for the preparation of long-chain vicinal diketones are examined. The acyloin condensation, followed by oxidation, provides an excellent route to symmetrical compounds but is not satisfactory for unsymmetrical diketones. The latter are prepared (i) from dialkylacetylenes by semihydrogenation, hydroxylation, and oxidation with aqueous N-bromosuccinimide; and (ii) from an α-acetoxy-acid
研究了制备长链邻二酮的几种方法。酰基转移酶缩合,然后进行氧化,提供了一种制备对称化合物的极佳途径,但对于不对称二酮而言并不令人满意。后者由(i)由二烷基乙炔经半氢化,羟基化和用N-溴代琥珀酰亚胺水溶液氧化而制得;(ii)由α-乙酰氧基酰氯和双四氢吡喃基或二苄基烷基丙二酸酯的钠衍生物衍生,然后除去保护基并脱羧得到α-乙酰氧基-酮,然后将其水解和氧化。