The natural acylphloroglucinol myrtucommulone A (1) inhibits microsomal prostaglandin E2 synthase (mPGES)-1 and 5-lipoxygenase (5-LO), and induces apoptosis of cancer cells. Starting from 1 as lead, 28 analogues were synthesized following a straightforward modular strategy with high yielding convergent steps. Major structural variations concerned (I) replacement of the syncarpic acid moieties by dimedone
A pair of enantiomeric triketone–phloroglucinol hybrids, (+)- and (−)-myrtuspirone A (1), featuring an unprecedented 3-isopropyl-3H-spiro[benzofuran-2,1′-cyclohexane] backbone, were isolated from the leaves of Myrtus communis. The absolute configuration of each enantiomer of 1 was determined by X-ray diffraction and chemical calculations. Furthermore, the gram-scale total syntheses of (±)-1 and (−)-1
In a one‐step conversion, commercially available or known compounds are connected to form myrtucommulone A, an anti‐inflammatory and apoptosis‐inducing substance from the common myrtle Myrtus communis (see scheme). This strategy can be used, as well to prepare myrtucommulone libraries.
Concise total syntheses of callistrilones A–E have been achieved from 7 and commercially available α-phellandrene (8). The synthetic strategy, which was primarily inspired by the biogenetic hypothesis, was enabled by an oxidative [3 + 2] cycloaddition followed by a Michael addition and an intramolecular nucleophilic addition to construct the target molecules. Moreover, viminalin I was also synthesized
Myrtucommulone A (1), which was isolated from myrtle and other species of the myrtaceae family, was synthesized through an enantioselective Michael addition of isobutyryl phloroglucinol (5) to isobutylidene syncarpic acid (4) that was induced by a chiral Al–Li–BINOL (1,1′-bi-2-naphthol) complex [(S,S)-ALB]. Because there is significant steric crowding in Michael acceptor 4, myrtucommulone A (1) was
从桃金娘和桃金娘科其他物种中分离出来的桃金娘 A (1) 是通过异丁酰间苯三酚 (5) 与异丁叉合果酸 (4) 的对映选择性迈克尔加成合成的,该加成是由手性 Al-Li-BINOL 诱导的(1,1'-bi-2-naphthol) 复合物 [(S,S)-ALB]。由于迈克尔受体 4 中存在显着的空间拥挤,因此获得了 ee 值为 70% 的桃金娘酮 A (1) 以及化学产率为 77% 的 meso-1。