GLYCOSIDE COMPOUND AND PREPARATION METHOD THEREFOR, COMPOSITION, APPLICATION, AND INTERMEDIATE
申请人:SHANGHAI HUTCHISON PHARMACEUTICALS LIMITED
公开号:US20210115082A1
公开(公告)日:2021-04-22
The present invention discloses a glycoside compound represented by Formula III, and a preparation method, a composition, use and an intermediate thereof. The glycoside compound provided in the present invention has simple preparation method, can significantly increase the expression of VEGF-A mRNA, and is effective in promoting the angiogenesis. This provides a reliable guarantee for the development of drugs with pro-angiogenic activity for treating cerebral infarction cerebral stroke, myocardial infarction, and ischemic microcirculatory disturbance of lower limbs.
Cascade Reaction of Alkynols and 7-Oxabenzonorbornadienes Involving Transient Hemiketal Group Directed C–H Activation and Synergistic Rh<sup>III</sup>/Sc<sup>III</sup> Catalysis
作者:Deng Yuan Li、Liang Liang Jiang、Shuang Chen、Zheng Lu Huang、Li Dang、Xin Yan Wu、Pei Nian Liu
DOI:10.1021/acs.orglett.6b02587
日期:2016.10.7
As the first cascade C–Hactivationdirected by a transient group, reaction of alkynols and 7-oxabenzonorbornadienes has been achieved via synergistic rhodium and scandium catalysis to afford spirocyclic dihydrobenzo[a]fluorenefurans. This transformation proceeds by a transient hemiketal group directedC–Hactivation, dehydrative naphthylation, and intramolecular Prins-type cyclization. Mechanistic
作为由一个瞬态基团控制的第一个级联C–H活化,炔醇与7-氧杂苯并降冰片二烯的反应已通过协同的铑和scan催化作用而得到,以提供螺环二氢苯并[ a ]芴呋喃。这种转化是通过一个半胱氨酸基团直接引导C–H活化,脱水萘化和分子内Prins型环化而进行的。机理研究和密度泛函理论计算表明,决定速率的步骤是C–H键断裂,瞬态半酮基和协同Rh III / Sc III催化均起关键作用。
A Sequential Activation of Alkyne and C–H Bonds for the Tandem Cyclization and Annulation of Alkynols and Maleimides through Cooperative Sc(III) and Cp*-Free Co(II) Catalysis
[4 + 2] oxidative Diels–Alder reaction of readily available alkynols with maleimide is achieved for the rapid access of pthalimide-fused multicyclic compounds. The reaction is proposed to go through a sequence of Sc(OTf)3-catalyzed electrophilic cyclization, ligand exchange with Cp*-free cobalt, and C–H activation followed by maleimide insertion.
A new strategy to construct a CC–CF3 subunit via CuBr-catalyzed domino reaction of homopropargyl amines: an efficient synthesis of trifluoromethyl containing building blocks 4-trifluoromethyl-2,3-dihydro-pyrroliums
A new strategy for the construction of a CCâCF3 subunit has been developed via CuBr-catalyzed domino cyclizationâtrifluoromethylation of homopropargyl amines with Umemoto's reagent. 4-Trifluoromethyl-2,3-dihydro-pyrroliums were produced in high yields. The usefulness of these products has been demonstrated by the transformation of them into various other trifluoromethylated molecules.
<i>p</i>-TsOH promoted synthesis of benzo-fused O-heterocycles from alkynols<i>via</i>ring contraction and C–O scission strategy
作者:Gopal Chandru Senadi、Jeh-Jeng Wang
DOI:10.1039/c8gc00749g
日期:——
Here, we report the first divergent synthesis of benzo-fused O-heterocycles by p-toluene sulfonic acid promoted cascade reactions involving alkyne hydration, doublecyclization, ring contraction and C–O bond cleavage from alkynols. The reaction mechanism was validated by obtaining the X-ray structure of fused benzo[b]oxepine intermediates. Moreover, some of the obtained derivatives could be transformed
在这里,我们报道了由对甲苯磺酸促进苯并稠合的O杂环的首次发散合成,该反应促进了级联反应,涉及炔烃水合,双环化,环收缩和炔醇裂解C-O键。通过获得熔融的苯并[ b ]氧杂环庚烷中间体的X射线结构来验证反应机理。而且,一些获得的衍生物可以转化为2,3-二取代的萘醌,作为天然产物和生物活性分子中的重要结构基序。