参考文献 1. JE McMurry 和 MP Fleming, J. Ani。克莱尼。社会,96.4708(1974)。2 . 作为 。泰利克和我。Wolochwicz,投标/。索尔..中国。Fr., 2147 (1973): b) T. Mukayama、T. Sato 和 J. Hanna, CJIeiiiimy Lftt., 1041 (1973)。3. a) J。E. 麦克蒙尼,克莱姆。Re\*., 89. I5 I3 (1989); b) A. Furstner 和 B. Bogadannovic, Ari,qtw。陈。小时。埃德。方程 / 。. 35, 2442 ( 1996)。4. W. -X。陈,J.-H。张,M.-Y。胡和X.-C。王。赛克斯是。701 (1990)。5. J. Li, D.-Q. Shi 和 W.-X。陈, 杂环, 45, 2381 (1997)。6.
Aldehydes and ketones, on treatment with a low-valent cerium reagent, undergo reductive dimerization to produce the corresponding pinacols in high yield.
醛和酮经低价铈试剂处理后,进行还原二聚化,从而以高收率生产相应的频哪醇。
Total Synthesis and Structural Revision of Vannusals A and B: Synthesis of the Originally Assigned Structure of Vannusal B
作者:K. C. Nicolaou、Adrian Ortiz、Hongjun Zhang、Philippe Dagneau、Andreas Lanver、Michael P. Jennings、Stellios Arseniyadis、Raffaella Faraoni、Dimitrios E. Lizos
DOI:10.1021/ja100740t
日期:2010.5.26
strategy based on the SmI(2)-mediated ring closure utilized vinyl iodide (-)-26 and aldehyde fragment (+/-)-86 as key building blocks, whose lithium-mediated coupling led to isomeric coupling products (+)-87 and (-)-88 (as shown in Scheme 17 in the article). Intermediate (-)-88 was converted, via (-)-89 and (-)-90/(+)-91, to vannusal B structure 2 (as shown in Scheme 18 in the article), whose spectroscopic
Practical and Asymmetric Reductive Coupling of Isoquinolines Templated by Chiral Diborons
作者:Dongping Chen、Guangqing Xu、Qinghai Zhou、Lung Wa Chung、Wenjun Tang
DOI:10.1021/jacs.7b04256
日期:2017.7.26
We herein describe a chiral diboron-templated highly diastereoselective and enantioselective reductive coupling of isoquinolines that provided expedited access to a series of chiral substituted bisisoquinolines in good yields and excellent ee’s under mild conditions. The method enjoys a broad substrate scope and good functional group compatibility. Mechanistic investigation suggests the reaction proceeds
Cyclic and acyclic amidines and pharmaceutical compositions containing them for use as progesterone receptor binning agents
申请人:——
公开号:US20030229072A1
公开(公告)日:2003-12-11
Disclosed are cyclic and acyclic amidines, pharmaceutical compositions containing such amidines, and their use in treating or preventing progesterone receptor mediated diseases or conditions, such as osteopenia and osteoporosis.
Enantioselective Epoxidation of Nonconjugated <i>cis</i>-Olefins by Chiral Dioxirane
作者:Christopher P. Burke、Yian Shi
DOI:10.1021/ol901724v
日期:2009.11.19
A variety of nonconjugated cis-olefins has been enantioselectively epoxidized with chiral ketones 2, and up to 92% ee has been obtained. The two prochiral faces of an olefin are likely stereodifferentiated by the relative hydrophobicity of the olefin substituents and/or allylic oxygen functionality.