期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 16, 期 17, 页码 3213-3219出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ob00436f
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资金
- Universita degli Studi di Milano, Linea 2 Dotazione Annuale per Attivita Istituzionali
In this paper, we describe the silver triflate/p-toluenesulfonic acid co-catalysed synthesis of seventeen isocoumarins and two thieno[2,3-c]pyran-7-ones starting from 2-alkynylbenzoates and 3-alkynyl-thiophene-2-carboxylates, respectively. The reaction proceeds with absolute regioselectivity under mild reaction conditions and low catalyst loading, to afford the desired products in good to excellent yields. A conceivable reaction mechanism is proposed and supported by isotope-exchange tests, H-1 NMR studies and ad hoc experiments.
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