An enantioselective total synthesis of Sch-725674 using dithiane alkylation, cross metathesis reaction, Yamaguchi macrolactonization and a substrate controlled stereoselective reduction as key steps is described.
Enantioselective Modular Total Synthesis of Macrolides Sch725674 and C-4-<i>epi</i>-Sch725674
作者:Brijesh M. Sharma、Arjun Gontala、Pradeep Kumar
DOI:10.1002/ejoc.201501531
日期:2016.2
synthesis of its C-4 epimer. Key reactions of the synthetic pathway include a Jacobsen hydrolytic kinetic resolution of an epoxide followed by its regioselective opening through a Yamaguchi–Hirao alkynylation, and ring-closingmetathesis reaction to furnish the unique 14-membered ring macrolactone. In addition, the influence of protecting groups on the efficiency of the ring-closingmetathesis (RCM) macrocyclization
Enantiospecific Total Synthesis of Macrolactone Sch 725674
作者:Amit K. Bali、Sunil K. Sunnam、Kavirayani R. Prasad
DOI:10.1021/ol5018678
日期:2014.8.1
The enantiospecific totalsynthesis of 14-membered macrolactone Sch 725674 was accomplished from tartaric acid. Key reactions in the synthesis include the Ley’s dithiaketalization of an alkynone derived from the bis-Weinreb amide of tartaric acid, Boord olefination, and ring-closing metathesis of an acrylate ester.
A concise total synthesis of the macrolactone natural product Sch 725674 is accomplished starting from commercially available 2-deoxy-d-ribose. Pivotal reactions employed in the synthesis include the addition of 4-pentenylmagnesium bromide to the lactol derived from 2-deoxy-d-ribose, olefin cross metathesis and Yamaguchi macrolactonization.
大环内酯的天然产物SCH 725674的简明的全合成是从完成的起始市售2-脱氧- d -核糖。在合成中采用枢轴反应包括加入4- pentenylmagnesium溴到乳醇衍生自2-脱氧d -核糖,烯烃交叉复分解和山口macrolactonization。
First Total Synthesis of Gliomasolide C and Formal Total Synthesis of Sch-725674
作者:B. Seetharamsingh、Pankaj V. Khairnar、D. Srinivasa Reddy
DOI:10.1021/acs.joc.5b02318
日期:2016.1.4
Syntheses of two 14-membered macrolides Sch-725674 and Gliomasolide C are described here. The firsttotalsynthesis of Gliomasolide C, the short synthesis of Sch-725674, and regioselective Wacker oxidation of internal olefin are the highlights of this disclosure. In addition, a key macrocycle with orthogonal functionalities was designed and synthesized on a gram scale for the generation of analogues