The intramolecular Diels-Alder cycloaddition of N-dienoyl acrylimidates. An efficient approach for the synthesis of hexahydroisoquinolones and hexahydroisoindolones
Base-Promoted (3 + 2) Cycloaddition of Trifluoroacetohydrazonoyl Chlorides with Imidates En Route to Trifluoromethyl-1,2,4-Triazoles
作者:Yue Zhang、Jun-Liang Zeng、Zhen Chen、Ren Wang
DOI:10.1021/acs.joc.2c01926
日期:2022.11.4
base-mediated (3 + 2) cycloaddition of trifluoroacetohydrazonoyl chlorides with imidates for the construction of 3-trifluoromethyl-1,2,4-triazoles has been described. This reaction is characterized by readily starting materials, simple reaction conditions, good yields, a broad substrate scope, and excellent regioselectivity. The utility of this protocol has been validated by the synthesis of a drug-like
The strategy and synthetic efforts leading to efficient stereoselective syntheses of thiangazole, a tris-thiazolinyl-oxazole metabolite isolated from Poly-angium spp., and of hydantocidin, a spironucleoside metabolite isolated from Streptomyces hygroscopicus, are discussed.
SHEA K. J.; SVOBODA J. J., TETRAHEDRON LETT., 27,(1986) N 40, 4837-4840