Rai GS, Maru JJ. Synthetic strategies for pyrrolo[2,1-
f][1,2,4]triazine: the parent moiety of antiviral drug remdesivir.
Chem Heterocycl Compd (N Y) 2021;
56:1517-1522. [PMID:
33424029 PMCID:
PMC7779642 DOI:
10.1007/s10593-020-02844-9]
[Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 07/06/2020] [Indexed: 01/08/2023]
Abstract
This review summarizes diverse synthetic protocols for the preparation of pyrrolo[2,1-f][1,2,4]triazine derivatives, covering literature sources from the past two decades. For effective representation, the synthetic methods toward the title compound are classified into six distinct categories: 1) synthesis from pyrrole derivatives, 2) synthesis via bromohydrazone, 3) synthesis via formation of triazinium dicyanomethylide, 4) multistep synthesis, 5) transition metal mediated synthesis, and 6) rearrangement of pyrrolooxadiazines. A brief outline of all optimized schemes is provided with relevant examples.
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