On-Water Synthesis of 2-Substituted Quinolines from 2-Aminochalcones Using Benzylamine as the Nucleophilic Catalyst
作者:So Young Lee、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b01675
日期:2018.11.2
On-water synthesis of 2-substituted quinolines from 2-aminochalcone derivatives was developed using benzylamine as the nucleophilic catalyst. Various 2-aminochalcones could be applied to this protocol, and the desired 2-substituted quinoline products were isolated in excellent yields by simple filtration. Furthermore, we elucidated the role of benzylamine in this transformation and provided the detailed
The present application is directed to a new class of isoxazoles and their use as estrogen modulators.
本申请涉及一种新型异噁唑类化合物及其作为雌激素调节剂的用途。
Asymmetric Synthesis of All-Carbon Benzylic Quaternary Stereocenters via Conjugate Addition to Alkylidene and Indenylidene Meldrum’s Acids
作者:Ashraf Wilsily、Eric Fillion
DOI:10.1021/jo901559d
日期:2009.11.20
aryl group consistently leading to high enantioselectivities. The nature of the organozinc reagent on the efficiency and selectivity of the conjugateaddition was also investigated. The solid-state conformation was determined for a number of alkylidene Meldrum’s acids and correlated with the observed enantioselectivity in relation to the arene pattern of substitution.
Iminophenyl Oxazolinylphenylamine for Enantioselective Cobalt-Catalyzed Hydrosilylation of Aryl Ketones
作者:Xu Chen、Zhan Lu
DOI:10.1021/acs.orglett.6b02260
日期:2016.9.16
synthesized through three steps from commercially available starting materials. An efficient cobalt-catalyzed asymmetric hydrosilylation of simple ketones with a low catalyst loading of CoCl2 and IPOPA was developed to afford chiral alcohols in good yields with high enantioselectivities.
Asymmetric Total Synthesis of (−)-Juvabione via Sequential Ir-Catalyzed Hydrogenations
作者:Jia Zheng、Cristiana Margarita、Suppachai Krajangsri、Pher G. Andersson
DOI:10.1021/acs.orglett.8b02405
日期:2018.9.21
centers via sequential Ir-catalyzed hydrogenations. The first center is generated by hydrogenation of a styrene-type double bond (99% ee). The successive monohydrogenation of a diene intermediate constitutes the key step, granting high levels of regio- and stereocontrol (94:6 dr). This novel strategy allowed the preparation of (−)-juvabione from simple starting materials in 9 steps and 17% total yield.