Improved Procedure for the Synthesis of <i>gem-</i>Diiodoalkanes by the Alkylation of Diiodomethane. Scope and Limitations
作者:James A. Bull、André B. Charette
DOI:10.1021/jo8014616
日期:2008.10.17
employing a convenient modified procedure for the alkylation of NaCHI2 with alkyl iodides. Complete conversion to the diiodide is reliably obtained, avoiding a problematic separation of any remaining iodide starting material. Functional group tolerance toward olefins, acetals, ethers and silyl ethers, carbamates, and hindered esters is demonstrated. The use of an excess of LiCHI2 allows complete conversion
通过采用方便的改良方法将NaCHI2与烷基碘烷基化,可以得到高至极好的收率的功能化的宝石二碘代烷烃。可靠地实现了向二碘化物的完全转化,避免了任何残留的碘化物原料的分离问题。证明了对烯烃,缩醛,醚和甲硅烷基醚,氨基甲酸酯和受阻酯的官能团耐受性。使用过量的LiCHI 2可以使烯丙基和苄基溴完全转化,而从二碘化物产物中消除得最少。