<span style="font-size:20.0pt;mso-bidi-font-size:15.0pt; font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">1,3-Dipolar cycloaddition reactions of substituted open-chain conjugated <span style="font-size:19.0pt;mso-bidi-font-size:14.0pt;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">azomethine <i><span style="font-size: 20.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US; mso-bidi-language:AR-SA">N-oxides </span></i><span style="font-size:19.0pt; mso-bidi-font-size:14.0pt;font-family:"Times New Roman";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US; mso-bidi-language:AR-SA">with substituted <i style="mso-bidi-font-style:normal">N</i>-arylmaleimides leading to the synthesis of new stereoisomeric 2,5 -diaryl-3- (<i style="mso-bidi-font-style:normal">o</i>-nitro)-styryl -<i style="mso-bidi-font-style: normal">4H</i>-2,3,3a,5,6,6a- hexahydropyrrolo <span style="font-size: 18.5pt;mso-bidi-font-size:13.5pt;font-family:Arial;mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US; mso-bidi-language:AR-SA;mso-bidi-font-style:italic">[3,4-<i>d</i>]<i> </i><span style="font-size:19.0pt;mso-bidi-font-size:14.0pt;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">isoxazole-4, 6-dione derivatives</span></span></span></span></span>

292-2961,3-Dipolar cycloaddition of substituted open-chain conjugated azomethine <span style="font-size: 14.0pt;mso-bidi-font-size:9.0pt">N-oxides<span style="font-size: 14.0pt;mso-bidi-font-size:9.0pt;mso-bidi-font-style:italic"> 1<span style="font-size:13.5pt; mso-bidi-font-size:8.5pt;font-family:Arial"> <span style="font-size: 13.0pt;mso-bidi-font-size:8.0pt">with substituted N-arylmaleimides 2 leads to the synthesis of new stereoisomeric 2,5-diaryl-3-(o-nitro)-styryl-<i style="mso-bidi-font-style: normal">4H-2,3,3a,5,6,6a-hexahydropyrrolo <span style="font-size:14.0pt;mso-bidi-font-size:9.0pt;font-family:Arial;mso-bidi-font-style: italic">[3,4-d] <span style="font-size:13.0pt;mso-bidi-font-size: 8.0pt">isoxazole-4,6-dione derivatives 3 in excellent yield. These stereoisomers have been characterized as cis-<span style="font-size:13.0pt;mso-bidi-font-size: 8.0pt;mso-bidi-font-style:italic">3A<span style="font-size:13.0pt; mso-bidi-font-size:8.0pt"> <span style="font-size:13.0pt;mso-bidi-font-size: 8.0pt">and trans-3B on the basis of their spectral measurements and are obtained in the ratio of almost 1:2 respectively in all the reaction, which is the reverse of the stereoisomers obtained through the 'Huisgen reaction’ of <i style="mso-bidi-font-style: normal">C,N-diaryl nitrones with N-aryl maleimides as reported earlier from these laboratories.