Copper-assisted preparation of pyridinyl sulfonate esters from hydroxypyridines and sodium sulfinates
作者:Qian Li、Haibo Zhu、Yishuai Liu、Liu Yang、Qiangwen Fan、Zongbo Xie、Zhang-Gao Le
DOI:10.1039/d1ra08568a
日期:——
broad range of hydroxypyridines and sodium sulfinates into their corresponding pyridinyl tosylates was developed. Key features of this base- and ligand-free protocol include using the cheap and readily available CuBr2 as a medium and the use of sodium sulfinates as formal sulfonylation reagents. A variety of functional pyridinyl tosylates could be formed with good yields, which can easily be converted into
When N-fluoropyridinium salt of the following formula is prepared by reacting a pyridine compound with a Brønsted acid and fluorine, an excess amount of the pyridine compound relative to the amount of the Brønsted acid being used, a high yield results.