Asymmetric synthesis of 5-(1-hydroxyalkyl)-5-methyl-5H-furan-2-ones
摘要:
The reactivity of 5-methyl-4-(pyrrolidin-1-yl)-5H-furan-2-one with aldehydes and with acyl chlorides followed by reduction was studied. The aldol condensation gave predominantly the anti aldol product when the acylation-reduction sequence led exclusively to the syn product. The use of a chiral pyrrolidine, (S)-2-methoxymethylpyrrolidine (SMP), allowed the synthesis of enantio-enriched compounds, the acylation-reduction leading to the (R,R) addition product. (C) 2003 Elsevier Ltd. All rights reserved.
The present invention relates to novel bicyclic enamino(thio)carbonyl compounds, to processes for their preparation and to their use for controlling animal pests, especially arthropods, in particular insects.
Synthesis of the Core Framework of the Cornexistins by Intramolecular Nozaki-Hiyama-Kishi Coupling
作者:Anthony Aimon、Louis J. Farrugia、J. Stephen Clark
DOI:10.3390/molecules24142654
日期:——
to the construction of the core framework of the herbicidalnaturalproductscornexistin and hydroxycornexistin has been developed. Formation of the nine-membered carbocycle found in the naturalproducts has been accomplished by an intramolecular Nozaki-Hiyama-Kishi reaction between a vinylic iodide and an aldehyde. Good yields of carbocyclic products were obtained from the reaction, but diastereomeric
Synthesis of the Carbocyclic Core of the Cornexistins by Ring-Closing Metathesis
作者:J. Stephen Clark、Frederic Marlin、Bastien Nay、Claire Wilson
DOI:10.1021/ol027265y
日期:2003.1.1
An advanced intermediate in the synthesis of the phytotoxins cornexistin and hydroxycornexistin has been synthesized. Sequential palladium-mediated sp(2)-sp(3) fragment coupling and ring-closing diene metathesis have been used to construct the nine-membered carbocyclic core found in the natural products. [reaction--see text]
Synthetic studies on the cornexistins: synthesis of (±)-5-epi-hydroxycornexistin
作者:J. Stephen Clark、John M. Northall、Frédéric Marlin、Bastien Nay、Claire Wilson、Alexander J. Blake、Michael J. Waring
DOI:10.1039/b811245b
日期:——
The synthesis of 5-epi-hydroxycornexistin (44), a diastereoisomer of the herbicidal natural product hydroxycornexistin (2) has been completed. Palladium mediated sp(2)-sp(3) coupling of the stannane 25 and the chloride 31 and ring-closing metathesis of the resulting diene 32 has been used to construct the tricyclic lactone 34a, which possesses the nine-membered carbocyclic core found in the natural
SUBSTITUTED 3-(5-MEMBERED UNSATURATED HETEROCYCLYL-1, 3-DIHYDRO-INDOL-2-ONE'S AND DERIVATIVES THEREOF AS KINASE INHIBITORS
申请人:Guo Xialing
公开号:US20070173500A1
公开(公告)日:2007-07-26
The present invention relates to organic molecules capable of modulating tyrosine kinase signal transduction in order to regulate, modulate and/or inhibit abnormal cell proliferation.