Chiral phosphoric acid catalyzed oxidative kinetic resolution of cyclic secondary amine derivatives including tetrahydroquinolines by hydrogen transfer to imines
Catalytic Regio‐ and Stereoselective Alkene Sulfenoamination for 1,4‐Benzothiazine Synthesis
作者:Nur‐E. Alom、Navdeep Kaur、Fan Wu、Shannon Jasmine Saluga、Wei Li
DOI:10.1002/chem.201900549
日期:2019.5.17
An alkene sulfenoamination reaction with 2‐aminothiophenol is developed using iodide catalysis. This reaction renders access to useful 1,4‐benzothiazines with good functional group compatibility including both electron‐donating and electron‐withdrawing substituents. The reaction is proposed to proceed through an inversion of the polarity of the thiol functionality. Our mechanistic studies reveal that
AbstractThis study reports on the thiourea dioxide catalyzed transferhydrogenation of diverse C=N–containing heterocyclic compounds with Hantzsch ester as the hydrogen source. With this cost effective and readily available catalyst, a wide range of 2-substituted quinolines, 3-substituted-2H-1,4-benzoxazines and 3-substituted-2H-1,4-benzothiazines were efficiently reduced to the corresponding tetrahydroquinolines