In this article, we describe the synthesis of various substituted Chromene[1,3]thiazolo [2,1,3] benzothiadiazoles 4a-l by conventional (Method A) and microwave-assisted (Method B) which achieved reductions in reaction times, higher yields, and a cleaner reaction than the conventional method. A comparative study of these two methods has been discussed.
One-pot syntheses of novel pyrazole-containing bisphosphonate esters at room temperature
作者:Haoyue Xiang、Xueyu Qi、Yuyuan Xie、Guangyu Xu、Chunhao Yang
DOI:10.1039/c2ob25889g
日期:——
An efficient general synthetic approach has been developed to synthesize pyrazole-containing bisphosphonate (N-BPs) esters from chromenone derivatives via a sequential two-step reaction in one pot at ambient temperature in good to excellent yields. This protocol provides a new convenient method to prepare lipophilic bisphosphonate precursors with potential activities.