作者:Liselle Atkin、Angus Robertson、Jonathan M. White、Mark A. Rizzacasa
DOI:10.1021/acs.orglett.1c00971
日期:2021.5.7
The total synthesis of viridiofungins A (1) and B (2) via β-lactone 3 in 13 steps is reported. Key steps included an HF-mediated rearrangement of cyclobutene diester 9 to form a bicyclic lactone 6, an olefin crossmetathesis between disubstituted alkene 3 and alkene 4 in which isomerization was suppressed, and a novel β-lactone ring opening to form the amide. Deprotection then gave either viridiofungin