作者:Hiu C. Lam、Quang D. Phan、Christopher J. Sumby、Jonathan H. George
DOI:10.1071/ch18141
日期:——
tetracyclic meroterpenoids recently isolated from Hypericum japonicum. All four of these natural products have been synthesised using oxidative, intermolecular hetero-Diels–Alder reactions to couple their common biosynthetic precursor, norflavesone, to the appropriate monoterpene building blocks: sabinene, β-pinene, and α-pinene. The synthesis of enantiomerically pure hyperjapones H and I and comparison
A phloroglucinol‐terpene adduct (PTA) collection consisting of twenty‐four molecules featuring three skeletons was discovered from Baeckea frutescens. Inspired by its biosynthetic hypothesis, we synthesized this PTA collection by reductive activation of stable phloroglucinol precursors into highly reactive ortho‐quinone methide (o‐QM) intermediates and subsequently Diels–Alder cycloaddition. We also
The present invention is directed to pest-controlling compositions comprising as active ingredients one or more β-diones, particularly β-diketones and β-triketones, and to the use of these compositions inter alia for preventing, eradicating, destroying, repelling or mitigating harmful, annoying or undesired pests including insects, arachnids, helminths, molluscs, protozoa and viruses. The present invention is further directed to processes of preparing β-diones by de novo synthesis or from natural sources such as volatile oil-bearing plants from families including Alliaceae, Apiaceae, Asteraceae, Cannabinaceae, Lamiaceae, Pteridaceae, Myrtaceae, Myoporaceae, Proteaceae, Rutaceae and Zingiberaceae.