A new one-pot solvent-free synthesis of pyridinyl tosylates via diazotization of aminopyridines
摘要:
A new, convenient, one-pot method for the synthesis of pyridinyl tosylates is developed. The procedure involves sequential diazotization/tosylation of aminopyridines with sodium nitrite and p-toluenesulfonic acid under solvent-free conditions in a water paste at room temperature. (C) 2010 Elsevier Ltd. All rights reserved.
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