Protocols for the synthesis of diverse pentacarboxycyclopentadienes are described. Starting from readily available pentacarbomethoxycyclopentadiene, transesterification offers single-step access to aliphatic ester derivatives, while treatment with amines produces mono- or diamides. For less nucleophilic alcohols, an alternative procedure involving the in situ generation and esterification of a putative cyclopentadiene pentaacid chloride has been developed.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5859554 | PMC |
| http://dx.doi.org/10.1021/acs.orglett.7b01867 | DOI Listing |
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