HFIP as a versatile solvent in resorcin[n]arene synthesis
Hormoz Khosravi1, Valeria Stevens1, Raúl Hernández Sánchez1,2
1Department of Chemistry, Rice University, 6100 Main St., Houston, Texas 77005, USA.
Abstract:
Herein, we present 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) as an efficient solvent for synthesizing resorcin[n]arenes in the presence of catalytic amounts of HCl at ambient temperature and within minutes. Remarkably, resorcinols with electron-withdrawing groups and halogens, which are reported in the literature as the most challenging precursors in this cyclization, are tolerated. This method leads to a variety of 2-substituted resorcin[n]arenes in a single synthetic step with isolated yields up to 98%.
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