Nucleophilic Conjugate 1,5-Addition of Gilman Reagents to (E)-Hex-2-en-4-ynedioates: An Access to β(γ′)-Substituted Muconates
摘要:
An unusual nucleophilic conjugate addition of organocuprates to enynedioates resulted in chemo- and regioselective formation of ()-addition products, rather than ()-addition products, in moderate to good yields. This addition pattern is different from that with organophosphanes or alkyl amines, and presents a short and efficient method for the preparation of various ()-alkyl- or -aryl-substituted muconates compared with other synthetic approaches.
Regioselective and stereoselective sulfonylation of alkynylcarbonyl compounds in water
作者:Wenyi Li、Guoxing Yin、Lei Huang、Yan Xiao、Zhimin Fu、Xiu Xin、Fang Liu、Zhizhang Li、Weimin He
DOI:10.1039/c6gc01196a
日期:——
A simple and efficient route for the synthesis of Z-[small beta]-sulfonyl-[small alpha],[small beta]-unsaturated carbonylcompounds by using water as the solvent and hydrogen source is developed.
A convenient and efficient approach to (E)-2-iodo-3-(methylthio)acrylate has been developed through direct iodothiomethylation of alkynes with aqueous HI and DMSO under mild conditions. This novel protocol has demonstrated a unique difunctionalization of electron-deficient alkynes with a broad substrate scope and excellent functional-group tolerance. Preliminary mechanistic studies indicated that prior
通过在温和条件下用 HI 和 DMSO水溶液直接碘硫甲基化炔烃,开发了一种方便有效的 ( E )-2-iodo-3-(甲硫基)丙烯酸酯方法。这种新颖的协议证明了缺电子炔烃的独特双功能化,具有广泛的底物范围和出色的官能团耐受性。初步机理研究表明,先对炔烃进行二碘化,然后用原位产生的 DMS 进行亲核取代,导致形成 ( E )-2-iodo-3-(methylthio) 丙烯酸酯。
Regio- and Stereoselective Hydrosulfonation of Alkynylcarbonyl Compounds with Sulfinic Acid in Water
We report the atom-economic and environmentally friendly synthesis of Z-β-sulfonyl-a,β-unsaturatedcarbonylcompounds in water. The mechanism study reveals that the hydrosulfonylation of alkynylcarbonyl compounds with sulfinic acids proceeds via a mechanism that features a sulfinic acid molecule protonating an alkynyl motif to form the ethenium intermediate, which subsequently reacted with a sulfonyl
The invention generally relates to the field of nuclear transport modulators, e.g., CRM1 inhibitors, and more particularly to new substituted-heterocyclic azole compounds, the synthesis and use of these compounds and their pharmaceutical compositions, e.g., in the treatment, modulation and/or prevention of physiological conditions associated with CRM1 activity such as in treating cancer and other neoplastic disorders, inflammatory diseases, disorders of abnormal tissue growth and fibrosis including cardiomyopathy, pulmonary fibrosis, hepatic fibrosis, glomerulonephritis, and other renal disorders, and for the treatment of viral infections (both acute and chronic).