Facile Preparation of 2-Iodophenyl Trifluoromethanesulfonates: Superior Aryne Precursors
作者:Timothy Snowden、Ashok Ganta
DOI:10.1055/s-2007-985565
日期:——
A comparative study of 3-methoxyaryne precursors revealed 2-iodo-3-methoxyphenyl triflate as the most effective in nonpolar solvent. Use of Hoppe’s N-isopropyl carbamate allows for the systematic preparation of a variety of 2-iodophenyl triflates via a directed ortho-lithiation-iodination-decarbamation sequence. These steps are possible without isolation of the intermediate iodophenyl carbamates.
对3-甲氧基炔前体的比较研究揭示了2-碘-3-甲氧苯基三氟甲磺酸盐在非极性溶剂中效果最佳。利用Hoppe的N-异丙基氨基甲酸酯,可以通过定向邻位锂化-碘化-脱氨基甲酸化序列系统地制备多种2-碘苯基三氟甲磺酸盐,而这些步骤无需分离中间的碘苯基氨基甲酸酯。