An Unconventional Approach to the Enantioselective Synthesis of Caryophylloids
摘要:
The chiral enones 4 and ent-4 have been synthesized enantiomerically as configurationally stable compounds that can be used for the synthesis of caryophylloids. For instance, ent-4 has been converted to the marine natural product coraxeniolide A.
[EN] HETEROCYCLIC COMPOUNDS AND METHODS FOR THEIR USE<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES ET LEURS PROCÉDÉS D'UTILISATION
申请人:SPINIFEX PHARM PTY LTD
公开号:WO2013110135A1
公开(公告)日:2013-08-01
The present invention relates to heterocyclic compounds useful for antagonising angiotensin II Type 2 (AT2) receptor. More particularly the invention relates to piperidine compounds, compositions containing them and their use in methods of treating or preventing disorders or diseases associated with AT2 receptor function including neuropathic pain, inflammatory pain, conditions associated with neuronal hypersensitivity, impaired nerve conduction velocity, cell proliferation disorders, disorders associated with an imbalance between bone resorption and bone formation and disorders associated with aberrant nerve regeneration.
Ni(NHC)]-Catalyzed Cycloaddition of Diynes and Tropone: Apparent Enone Cycloaddition Involving an 8π Insertion
作者:Puneet Kumar、Ashish Thakur、Xin Hong、K. N. Houk、Janis Louie
DOI:10.1021/ja5105206
日期:2014.12.24
calculations show that the apparent enone cycloaddition occurs through a distinctive 8π insertion of tropone. The initial intramolecular oxidative cyclization of diyne produces the nickelacyclopentadiene intermediate. This intermediate undergoes an 8π insertion of tropone, and subsequent reductive elimination generates the [5–6–7] fused tricyclic product. This initial product undergoes two competing
Fused ring aziridines as a facile entry into triazole fused tricyclic and bicyclic heterocycles
作者:Fang Fang、Megan Vogel、Jennifer V. Hines、Stephen C. Bergmeier
DOI:10.1039/c2ob07042a
日期:——
alkyne has provided a useful entry into triazole fused tricyclic heterocycles containing both the triazole ring and the oxazolidin-2-one ringsystem. The requisite azido-alkynes have been prepared via a two-step sequence from fused ring aziridines. A series of 6–12 membered rings containing both the oxazolidinone and triazole rings have been prepared. These ringsystems have been designed as conformationally
A Mechanistic Dichotomy in Ruthenium-Catalyzed Propargyl Alcohol Reactivity: A Novel Hydrative Diyne Cyclization
作者:Barry M. Trost、Michael T. Rudd
DOI:10.1021/ja036410f
日期:2003.9.1
was tested in the reaction of diynes in the presence of water. Quite excitingly, cyclization comcommittant with addition of water to form 1-acylcycloalkenes occurs. This proves to be general process to form five- and six-membered rings. Interestingly, hydrative cyclization of Z-5-decen-2,8-diyne to 1-acetyl-2-ethyl-cyclohexa-1,4-diene occurs without isomerization of the doublebonds. Furthermore, the
Access to Highly Functionalized Cyclopentenones via Diastereoselective Pauson–Khand Reaction of Siloxy-Tethered 1,7-Enynes
作者:Austin G. Gallagher、Huan Tian、Osmar A. Torres-Herrera、Shuai Yin、Anxin Xie、Daniel M. Lange、Jerica K. Wilson、Louis G. Mueller、Michael R. Gau、Patrick J. Carroll、Dionicio Martinez-Solorio
DOI:10.1021/acs.orglett.9b03255
日期:2019.11.1
Pauson–Khand reaction (PKR) of siloxy-tethered 1,7-enynes for the synthesis of cyclopentaoxasilinones has been developed. This transformation can be performed on a multigram scale and is characterized by a broad substrate scope, functional group compatibility, and high chemo- and diastereoselectivity. Oxidation of the resulting cyclopentaoxasilinones delivers stereoenriched β-alkylated cyclopentenones, which