Mechanistic Study of Base-Promoted Rearrangement of 1,5-Dibromopentacyclo[5.3.0.0<sup>2,5</sup>.0<sup>3,9</sup>.0<sup>4,8</sup>]decane-6,10-dione to 10-Oxa-9-oxopentacyclo[5.3.0.0<sup>2,4</sup>.0<sup>3,6</sup>.0<sup>5,8</sup>]decane-3-carboxylic Acid
作者:Takeshi Hasegawa、Tomohiro Nigo、Yoshiyuki Kuwatani、Ikuo Ueda
DOI:10.1246/bcsj.66.2676
日期:1993.9
The conversion of 1,5-dibromopentacyclo[5.3.0.02,5.03,9.04,8]decane-6,10-dione (1) to 10-oxa-9-oxopentacyclo [5.3.0.02,4.03,6.05,8]decane-3-carboxylic acid (6) on treatment with 5% aqueous potassium hydroxide was shown to proceed through 1, exo-7-dibromo-9-oxotetracyclo[4.3.0.02,5.03,8]nonane-endo-4-carboxylic acid (2). Treatment of 1 with the base in heavy water gave rise to 2-d-6 deuterated at the 2-position, but 2 gave the protium analog 6 after the same treatment. These results are discussed in relation to reactions of similar compounds which have been previously described in the literature.
1,5-二溴五环[5.3.0.02,5.03,9.04,8]癸烷-6,10-二酮(1)经 5%氢氧化钾水溶液处理后转化为 10-氧杂-9-氧代五环[5.3.0.02,4.03,6.5%氢氧化钾水溶液处理 10-氧杂-9-氧代五环[5.3.0.02,4.03,6.在重水中用碱处理 1,可得到在 2 位氚化的 2-d-6,但同样处理 2 后可得到氕类似物 6。这些结果与以前文献中描述的类似化合物的反应进行了讨论。