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- W3023909650 abstract "Complex [(DMPU)2Zn(CF2H)2] 1 is a crystalline organometallic reagent with utility in various catalytic difluoromethylation reactions under mild conditions. Unfortunately, this reagent is not commercially available and the procedure for the preparation of this air- and moisture-sensitive zinc complex has only been reported on a small scale. Herein, we report the development of a continuous process for the preparation of reagent 1 on >100 g scale by using a continuous stirred-tank reactor. The key to success is the design of a continuous reactive crystallization process in which the precipitation of the zinc complex 1 is driven by its low solubility in the reaction solvent. The improved synthesis of the iododifluoromethane precursor 2 from readily available bromodifluoroacetic acid further enables the synthesis of complex 1 on a larger scale." @default.
- W3023909650 created "2020-05-13" @default.
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- W3023909650 date "2020-05-05" @default.
- W3023909650 modified "2023-10-14" @default.
- W3023909650 title "Continuous Process for Preparing the Difluoromethylating Reagent [(DMPU)<sub>2</sub>Zn(CF<sub>2</sub>H)<sub>2</sub>] and Improved Synthesis of the ICHF<sub>2</sub> Precursor" @default.
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- W3023909650 doi "https://doi.org/10.1021/acs.oprd.0c00089" @default.
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