Synthesis with Perfect Atom Economy: Generation of Furan Derivatives by 1,3-Dipolar Cycloaddition of Acetylenedicarboxylates at Cyclooctynes
作者:Klaus Banert、Sandra Bochmann、Andreas Ihle、Oliver Plefka、Florian Taubert、Tina Walther、Marcus Korb、Tobias Rüffer、Heinrich Lang
DOI:10.3390/molecules190914022
日期:——
undergo, at room temperature, a 1,3-dipolarcycloaddition with dialkyl acetylenedicarboxylates 1a,b to generate furan-derived short-lived intermediates 2, which can be trapped by two additional equivalents of 1a,b or alternatively by methanol, phenol, water or aldehydes to yield polycyclic products 3b-d, orthoesters 4a-c, ketones 5 or epoxides 6a,b, respectively. Treatment of bis(trimethylsilyl) acetylenedicarboxylate