Catalytic Enantioselective Construction of Chiroptical Boron-Stereogenic Compounds
作者:Bing Zu、Yonghong Guo、Chuan He
DOI:10.1021/jacs.1c08482
日期:2021.10.6
compounds are widely used in organic chemistry, the creation of a tetrahedral boron-stereogenic center in one enantiomeric form remains highly challenging. Given the labile nature of ligands attached to the tetracoordinate boron atom, only a handful of enantioenriched boron-stereogenic compounds have been reported via resolution or a chiral substrate-induced diastereoselective approach. To date catalytic
主族杂原子-立体化合物的构建具有重要意义,因为它们具有有趣的化学、物理、生物和立体电子特性。尽管有机硼化合物广泛用于有机化学,但以一种对映体形式创建四面体硼立体中心仍然极具挑战性。鉴于连接到四配位硼原子的配体的不稳定性质,只有少数通过拆分或手性底物诱导的非对映选择性方法报道了对映富集的硼立体化合物。迄今为止,硼-立体化合物的催化不对称合成仍然未知。这里,我们通过不对称铜催化的叠氮化物-炔烃环加成(CuAAC)反应证明了硼-立体化合物的第一个催化对映选择性构建。这种对映选择性的 CuAAC 反应不仅可以高产率地获得各种新型高功能化的硼立体杂环,并且具有良好的对映选择性,而且还可以产生具有各种潜在应用前景的光学活性末端炔烃和三唑部分。手性四配位硼化合物的进一步转化产生了几个复杂的杂环实体,它们带有硼-立体中心,而不会损失对映体纯度。此外,还研究了所选四配位硼化合物的 X 射线结构、外消旋化障碍和
AGONISTS OF PEROXISOME PROLIFERATOR ACTIVATED RECEPTOR-ALPHA
申请人:Luehr Gary W.
公开号:US20100184815A1
公开(公告)日:2010-07-22
Disclosed are compounds of the formula:
And pharmaceutically acceptable salts thereof, wherein the variables are as defined herein, which are useful in activating PPARα and in treating atherosclerosis hypercholesterolemia, primary hypercholesterolemia or mixed dyslipidemia, hypertriglyceridemia, Frederickson Types IV and V hyperlipidemia. Pharmaceutical compositions, intermediates useful in the preparation of the compounds of formula I and methods of making the compounds of formula I are also disclosed.
Transition-metal-free azide insertion of <i>N</i>-triftosylhydrazones using a non-metallic azide source
作者:Xueyu Li、Jin-Na Song、Swastik Karmakar、Ying Lu、Ye Lv、Peiqiu Liao、Zhaohong Liu
DOI:10.1039/d2cc05442f
日期:——
Benzylic azides, an important class of active organic synthons, were synthesized in high yields from the easily accessible N-triftosylhydrazones with stable TMSN3 under mild conditions. The reaction features high efficiency and excellent functional group tolerance, as illustrated by gram-scale synthesis and the synthesis of drug-like molecules. Mechanistic studies reveal that azidation occurs at the
苄基叠氮化物是一类重要的活性有机合成子,在温和条件下从易于获得的具有稳定 TMSN 3的N -triftosylhydrazone 以高产率合成。该反应具有高效和优异的官能团耐受性,如克级合成和类药分子的合成所示。机理研究表明,通过叠氮离子消除 N 2,在缺电子的重氮碳中发生叠氮化。
[EN] AGONISTS OF PEROXISOME PROLIFERATOR ACTIVATED RECEPTOR-a<br/>[FR] AGONISTES DU RÉCEPTEUR ? ACTIVÉ DE LA PROLIFÉRATION DES PEROXYSOMES
申请人:ARYX THERAPEUTICS INC
公开号:WO2010071813A1
公开(公告)日:2010-06-24
Disclosed are compounds of the formula: (I) And pharmaceutically acceptable salts thereof, wherein the variables are as defined herein, which are useful in activating PP ARa and in treating atherosclerosis hypercholesterolemia, primary hypercholesterolemia or mixed dyslipidemia, hypertriglyceridemia, Frederickson Types IV and V hyperlipidemia. Pharmaceutical compositions, intermediates useful in the preparation of the compounds of formula I and methods of making the compounds of formula I are also disclosed.