Rh2(OAc)4 catalyzed substrate selective [4+2]/[2+2] cycloaddition of acylketenes: a highly chemo- and regioselective synthesis of spiro(oxindolyl)oxazinones and β-lactams |
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| Authors: | BV Subba Reddy Govindaraju Karthik Tamilselvan Rajasekaran Aneesh Antony B Sridhar |
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| Institution: | 1. Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India;2. Center for X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 007, India |
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| Abstract: | A rhodium(II) catalyzed 4+2]/2+2] cycloaddition reaction of N-protected isatin-3-arylimine with acylketene derived from α-diazocarbonyl compounds has been achieved for the first time for the preparation of a novel class of spiro(oxindolyl)oxazinone and spiro(oxindolyl)-β-lactam derivatives. |
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