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Regioselective Synthesis of the 5,6-Dihydro-4H-furo[2,3-c]pyrrol-4-one Skeleton: A New Class of Compounds

✍ Scribed by Gani Koza; Emrah Karahan; Metin Balci

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
173 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

We hereby report the first preparation of the 5,6‐dihydro‐4__H__‐furo[2,3‐c]pyrrol‐4‐one (3) and its derivatives starting from methyl 3‐(methoxycarbonyl)furan‐2‐acetate (8). The ester functionality connected to the methylene group was regiospecifically converted to the desired monohydrazide 9. Conversion of 9 into the acyl azide 10 followed by Curtius rearrangement gave the corresponding isocyanate derivative 11 (Scheme 2). Reaction of 11 with different nucleophiles produced urethane and urea derivatives (Scheme 3). Intramolecular cyclization reactions provided the target compounds (Scheme 5). Removal of the amine‐protecting group formed the title compound 3.

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