Colombian Environment Minister Susana Muhamad said her country is reducing fossil fuels and deforestation, but global economics don't support climate action.

The Rh2(esp)2 and Zn(II)-bisoxazoline (BOX) complex-cocatalyzed asymmetric diamination of in situ generated difluoroenol species with azocarboxamides has been disclosed. This reaction features a formal [3 + 2]-cycloaddition reaction using difluoroenol intermediate as a C2 synthon, providing an efficient and robust approach for the synthesis of difluorinated imidazolidin-2-ones in good yields with high to excellent stereoselectivity (up to 95% ee). This method offers a complementary approach for the direct assembly of chiral difluoromethylene incorporated heterocycles by introducing in situ formed difluoroenol species as a practical C2 synthon rather than using presynthesized gem-difluoroalkenes. With this protocol, further synthetic applications in fluorine chemistry could be envisioned through the strategic interception of difluoroenol via cycloaddition reactions with appropriate partners.

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U.S. President Donald Trump has announced on social media he will be increasing tariffs on Canada by "10 per cent over and above what they are paying now" because of an advertisement by the Ontario go...