Synthesis of Chiral Polycyclic Tetrahydrocarbazoles by Enantioselective Aminocatalytic Double Activation of 2-Hydroxycinnamaldehydes with Dienals
作者:Yong-Chao Ming、Xue-Jiao Lv、Ming Liu、Yan-Kai Liu
DOI:10.1021/acs.orglett.1c02309
日期:2021.8.20
An efficient aminocatalytic enantioselective double-activation strategy has been developed that combines several different aminocatalytic modes in a cascade process, such as iminiumion, vinylogous iminiumion, trienamine, and dienamine activations. By using this strategy, 2-hydroxycinnamaldehydes worked well with various dienals via [4 + 2] cycloaddition and the oxa-Michael reaction-initiated cascade
Application of E1cB Elimination in Asymmetric Organocatalytic Cascade Reactions To Construct Polyheterocyclic Compounds
作者:Zhi-Hao You、Ying-Han Chen、Yu Tang、Yan-Kai Liu
DOI:10.1021/acs.orglett.9b03138
日期:2019.10.18
By introducing a carbon functionality at 2-position of chromane, the formal asymmetric functionalization of the 3-position of 2-substituted chromane has been realized via a highly chemo-, regio-, and stereoselective organocatalyticcascadereaction in a sequential one-pot manner involving an E1cB mechanism governed ring-opening process. Critical to our success was the design of a chiral dipeptide-based
SODIUM CHANNEL MODULATORS FOR THE TREATMENT OF PAIN AND DIABETES
申请人:CHROMOCELL CORPORATION
公开号:US20160130239A1
公开(公告)日:2016-05-12
Provided herein are sodium channel modulating Compounds, in particular NaV1.7 modulating compounds of Formula I or compounds of Formula I′:
In particular, provided herein are processes for the preparation of, intermediates used in the preparation of, pharmaceutical compositions comprising, and therapeutic methods comprising administering such compounds. In particular, provided herein are compounds for the treatment of pain and diabetes.
Organocatalytic asymmetric cascade cyclization reaction of o-hydroxy cinnamaldehydes with diphenylphosphine oxide
作者:Haiyun Sun、Yuan Li、Wei Liu、Yang Zheng、Zhengjie He
DOI:10.1016/j.cclet.2018.01.026
日期:2018.11
highly stereoselective asymmetriccascade cyclization reaction between o-hydroxycinnamaldehydes and diphenylphosphine oxide has been achieved with 84%–99% ee and 7:1-20:1 dr under the catalysis of l -diarylprolinol silyl ether. This reaction provides a facile access to highly enantioenriched 4-diphenylphosphinyl chroman-2-ols. It also represents a novel organocatalyticasymmetric phospha-Michael addition
Organocatalytic asymmetric Michael/hemiacetalization/acyl transfer reaction of α-nitroketones with <i>o</i>-hydroxycinnamaldehydes: synthesis of 2,4-disubstituted chromans
作者:Rajendra Maity、Subhas Chandra Pan
DOI:10.1039/c8ob00078f
日期:——
An organocatalyticasymmetriccascadeMichael/hemiketalization/acyl transfer reaction between o-hydroxycinnamaldehydes and α-nitroketones is developed. Prolinol TMS ether catalyst in combination with benzoic acid was found to be the most effective for this reaction which proceeds through an equilibrium of lactols to provide a single diastereomer of enantiopure 2,4-disubstituted chromans.