Regioselective α-Deuteration of Michael Acceptors Mediated by Isopropylamine in D<sub>2</sub>O/AcOD
作者:Vinod G. Landge、Kendra K. Shrestha、Aaron J. Grant、Michael C. Young
DOI:10.1021/acs.orglett.0c03839
日期:2020.12.18
hydrogen/deuteriumexchange is an important method to access deuterated compounds for chemical and biological studies. Herein is reported the first method for the regioselective α-deuteration of enals and enones. The transformation features D2O and AcOD as deuterium sources and amines as organocatalysts. The deuteration strategy is scalable and works on enals with a variety of substituted arene or heterocycle
特定地点的氢/氘交换是获取用于化学和生物研究的氘化化合物的重要方法。本文报道了第一种对 enals 和 enones 进行区域选择性 α-氘化的方法。转化的特点是 D 2 O 和 AcOD 作为氘源,胺作为有机催化剂。氘化策略是可扩展的,适用于具有各种取代芳烃或杂环基序以及烯酮的 enal。该方法已应用于氘代药物前体的合成。
Construction of 1,3-Oxazolidines through a Three-Component [3+2] Cycloaddition of Tetrahydroisoquinolines, Aldehydes, and Ethyl Ketomalonate
作者:Xiang Wu、Zheng-Hao Zhu、Hao He、Lei Ren、Cheng-Feng Zhu、You-Gui Li
DOI:10.1021/acs.joc.0c00616
日期:2020.5.1
chemoselective and diastereoselective synthesis of fused oxazolidines was achieved by a three-component cascade reaction of tetrahydroisoquinolines (THIQs), α,β-unsaturated aldehydes, and diethyl 2-oxomalonate. Probably due to the reactivity difference between the aldehyde and the ketone, the reaction proceeded through the condensation of THIQs with α,β-unsaturated aldehydes and 1,3-dipolarcycloaddition of the
Regiospecific photoisomerization of fluorinated (E,E)-1,4-diphenyl-1,3-butadienes
作者:Jin Liu、Kelly J. Boarman、Natalie L. Wendt、Lina M. Cardenas
DOI:10.1016/j.tetlet.2005.05.103
日期:2005.7
Photoisomerization of five fluorinated E,E-1-(R-phenyl)-4-phenyl-1,3-butadienes in solution (R = 1: p-monofluoro, 2: m,m′-difluoro, 3: m,m′,p-trifluoro, 4: o,o′,m,m′-tetrafluoro, 5: o,o′,m,m′,p-pentafluoro) was investigated via direct irradiation. Our results indicated that cis–transphotoisomerization of the fluorinated 1,4-diphenyl-1,3-butadienes in the excited singlet state took place exclusively
Asymmetric Ion Pair Catalysis of 6π Electrocyclizations: Brønsted Acid Catalyzed Enantioselective Synthesis of Optically Active 1,4-Dihydropyridazines
作者:Arindam Das、Chandra M. R. Volla、Iuliana Atodiresei、Wolfgang Bettray、Magnus Rueping
DOI:10.1002/anie.201301638
日期:2013.7.29
Electric slide: Described is a general, operationally simple, highly enantioselective Brønsted acid catalyzed condensation/6π‐electrocyclization reaction between hydrazones and α,β‐unsaturated aldehydes that yields valuable 1,4‐dihydropyridazines. The reaction exhibits high tolerance towards functional groups and affords products with up to 98 % ee.
[EN] ANTI-CANCER COMPOUNDS AND METHODS RELATED THERETO<br/>[FR] COMPOSES ANTICANCEREUX ET PROCEDES S'Y RAPPORTANT
申请人:STEWART JOHN M
公开号:WO2000011022A1
公开(公告)日:2000-03-02
The present invention provides compounds useful to inhibit tumor growth and to induce apoptosis. In general, the anti-cancer agents (ACA) are described by the formula (I): [ACA]n-X wherein, X is a linker group having 2-5 functional groups or is absent, n = 1, and ACA is selected from the group consisting of Formula (II), Formula (III), Formula (IV), Formula (V), and Formula (VI), as described herein. Other compounds described herein are defined by the Formula (VII), as described herein.