<span style="font-size:14.0pt;font-family:"Times New Roman";color:#090909;mso-bidi-font-weight: bold" lang="EN-IN">A facile <span style="font-size:14.0pt;font-family: "Times New Roman";color:#1B1B1B;mso-bidi-font-weight:bold" lang="EN-IN">synthesis of <span style="font-size:14.0pt;font-family:"Times New Roman";color:#090909; mso-bidi-font-weight:bold" lang="EN-IN">7,8/6,7 <span style="font-size: 14.0pt;font-family:"Times New Roman";color:#1B1B1B;mso-bidi-font-weight:bold" lang="EN-IN">fused <span style="font-size:14.0pt;font-family:"Times New Roman"; color:#090909;mso-bidi-font-weight:bold" lang="EN-IN">pyrano[<i><span style="font-size:14.0pt;font-family:Arial;color:#1B1B1B;mso-bidi-font-weight: bold" lang="EN-IN">4,3-b</span></i><span style="font-size:14.0pt;font-family: Arial;color:#1B1B1B;mso-bidi-font-weight:bold;mso-bidi-font-style:italic" lang="EN-IN">]<i> </i><span style="font-size:14.0pt;font-family:"Times New Roman";color:#090909; mso-bidi-font-weight:bold" lang="EN-IN">pyridinochromones <span style="font-size:14.0pt;font-family:"Times New Roman";color:#1B1B1B;mso-bidi-font-weight: bold" lang="EN-IN">and <span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";color:#1B1B1B;mso-ansi-language:EN-IN; mso-fareast-language:EN-US;mso-bidi-language:HI;mso-bidi-font-weight:bold" lang="EN-IN">evaluation of antibacterial activity</span></span></span></span></span></span></span></span></span>

Abstract

610-6137-Hydroxy-8/6-formyl chromones 2a-d on reaction with ethyl 3-aminocrotonate in acetic acid medium yield 7,8/6,7 fused pyrano[4,3-b]pyridino chromones 3a-d quantitatively.</span