Convergent Strategy for the Synthesis of Oxa‑, Thia‑, and Selena[5]helicenes by Acetylene-Activated SNAr Reactions
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资源简介：
A tandem acetylene-activated SNAr-anionic cyclization strategy is presented for the synthesis of chalcogen-containing hetero[5]helicenes. Oxa-, thia-, and selena[5]helicenes are accessed from common ortho-fluoro-ethynylarene precursors, allowing the heteroatoms to be installed at the 1-position or 1- and 12-positions of the hetero[5]helicene inner core surface.
创建时间：
2020-03-05
