Pd(II)-Catalyzed Annulation Reactions of Epoxides with Benzamides to Synthesize Isoquinolones
作者:Huihong Wang、Fei Cao、Weiwei Gao、Xiaodong Wang、Yuhang Yang、Tao Shi、Zhen Wang
DOI:10.1021/acs.orglett.0c04097
日期:2021.2.5
Epoxides as alkylating reagents are unprecedentedly applied in Pd(II)-catalyzed C–H alkylation and oxidative annulation of substituted benzamides to synthesize isoquinolones rather than isochromans, which is accomplished through alerting the previously reported reaction mechanism by the addition of oxidant and TEA. Under these conditions, various isoquinolones have been prepared with yields up to 92%
Synthetic Studies on Natural Isocoumarins and Isocarbostyril Derivatives Having an Alkyl Substituent at the 3-Position: Total Synthesis of Scoparines A and B, and Ruprechstyril
Two isocoumarins, scoparines A and B, having n-propyl group at the 3-position, and a new isocarbostynl, ruprechstynl, beanng n-pentyl substituent at the 3-position were synthesized via Sonogashira coupling of the corresponding aromatic halides and alkynes, followed by regioselective 6-endo-dig cyclization.
An efficient total synthesis of ruprechstyril from<i>Ruprechtia tangarana</i>
作者:Aamer Saeed
DOI:10.1080/14786419.2012.715292
日期:2013.7
A short total synthesis of natural isocarbostyril ruprechstyril (3-n-pentyl-6-methoxy-8-hydroxy-1(2H)-isoquinolinone) isolated from Ruprechtia tangarana is reported. 6,8-Dimethoxy-3-pentylisocoumarin obtained by condensation of 3,5-dimethoxyhomophthalic anhydride with hexanoyl chloride was smoothly converted to O-methylruprechstyril by refluxing with methanamide. Regioselective demethylation of the latter using anhydrous aluminium chloride in dichloromethane furnished the ruprechstyril. Complete demethylation to give (6-desmethoxyruprechstyril) was achieved using same reagent in ethanethiol.
ANTIFUNGAL AGENTS
申请人:Merck Sharp & Dohme Corp.
公开号:EP2217071A1
公开(公告)日:2010-08-18
Antifungal Agents
申请人:Bills Gerald F
公开号:US20100279861A1
公开(公告)日:2010-11-04
Novel isoxazolidinone compounds useful in the treatment and/or prevention of human and animal fungal infections, as well as in the control of phytopathogenic fungi in crops are described. Two novel strains of fungi, ATCC No. PAT-7894 and ATCC No. PAT-7895, are disclosed for the preparation of the described isoxazolidinone compounds.