Springer Iranian Journal of Science 2731-8095 39 3 2015 09 06 Synthesis of some new polycyclic aromatic monocyclic β-lactams 259 265 3149 10.22099/ijsts.2015.3149 EN A. Jarrahpour Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran M. Nazari Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran Journal Article 2014 11 09   <span style="font-size: xx-small;">In this paper the synthesis of some new polyaromatic monocyclic β-lactams has been reported. These cycloadducts have been synthesized by the [2+2] ketene-imine cycloaddition reaction known as the Staudinger reaction. All of the products have been fully characterized by IR, </span><span style="font-size: xx-small;">1</span><span style="font-size: xx-small;">H-NMR, </span><span style="font-size: xx-small;">13</span><span style="font-size: xx-small;">C-NMR, mass spectroscopy and elemental analyses. The X-ray crystal structure of a cis β-lactam has been also presented. The cycloaddition reaction was found to be totally diastereoselective leading exclusively to the formation of the </span><em><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;">cis</span></span></em><span style="font-size: xx-small;">-β-lactams for </span><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;">3c-e, 3g, 3i-k, 3p </span></span><span style="font-size: xx-small;">and the rest were found to be totally </span><em><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;"><span style="font-family: Times New Roman,Times New Roman; font-size: xx-small;">trans. </span></span></em> https://ijsts.shirazu.ac.ir/article_3149_5cbe88905906ff1d421b3b88527bf9c5.pdf