Reagent-Controlled Divergent Synthesis of 2-Amino-1,3-Benzoxazines and 2-Amino-1,3-Benzothiazines
作者:V. P. Rama Kishore Putta、Nagaraju Vodnala、Raghuram Gujjarappa、Ujjawal Tyagi、Aakriti Garg、Sreya Gupta、Prasad Pralhad Pujar、Chandi C. Malakar
DOI:10.1021/acs.joc.9b02384
日期:2020.1.17
devised for the synthesis of 4H-1,3-benzoxazines and related biologically important heterocycles in high yields under mild conditions. These scaffolds could be efficiently constructed using two different chemoselective reactions that rely on the choice of reagents and reaction conditions. The treatment of various 2-amino-arylalkyl alcohols with isothiocyanates afforded thiourea intermediates, which were