An efficient and transition-metal-free three-component reaction with benzynes formed in situ from 2-(trimethylsilyl)aryl triflate, phosphites, and ketones was developed for the synthesis of benzoxaphosphole 1-oxides. An array of benzoxaphosphole 1-oxides were prepared from both activated and non-Activated ketones in moderate to good yields with a broad functional group tolerance. This reaction is useful for preparing organophosphorus compounds encountered in natural products and materials.
S.-J.H. was supported by the Korea Institute of Science and Technology. This research was supported in part by a National Research Council of Science & Technology (NST) grant from the Korea government (MSIT) (CPS21061-100), National Research Foundation of Korea (NRF) grants funded by the Korea government (MSIT) (2020R1C1C1005563 and 2019R1A6A1A11051471), and the Technology Development Program to Solve Climate Change of the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (NRF-2020M1A2A2079798).
