[EN] ECO-FRIENDLY MATERIALS AND METHODS FOR RENEWABLE AND SUSTAINABLE APPLICATIONS IN MATERIAL CHEMISTRY<br/>[FR] MATÉRIAUX ET PROCÉDÉS RESPECTUEUX DE L'ENVIRONNEMENT POUR DES APPLICATIONS RENOUVELABLES ET DURABLES DANS LA CHIMIE DES MATÉRIAUX
申请人:NDSU RES FOUND
公开号:WO2017156066A1
公开(公告)日:2017-09-14
The invention relates to novel hydrazide-based templates, methods of making the same, and methods of using the hydrazide-based templates as molecular scaffolds for asymmetric light driven transformations, light driven material synthesis, and biological applications. Furthermore, the present invention relates to photoinitiators, monomers, and polymers derived from biomass, together with methods and methods of using the same.
Organocatalytic stereoselective conjugate addition of 3-substituted oxindoles with in situ generated ortho-quinone methides
作者:Weihong Liang、Wenhao Yin、Tingzhong Wang、Fayang G. Qiu、Junling Zhao
DOI:10.1016/j.tetlet.2018.03.069
日期:2018.5
A novel method for the stereoselectiveconjugateaddition of 3-substituted oxindoles to in situ generated o-QMs was described. This process was catalyzed efficiently by a cinchonidine-derived squaramide catalyst in oil-water phase, furnishing the corresponding 3,3-disubsituted oxindole derivatives in moderate to high yields (up to 98%) with high stereoselectivities (up to 95% ee, 15.4:1 dr). The utility
Bifunctional Amine-Squaramide Catalyzed Friedel-Crafts Alkylation Based on<i>ortho</i>-Quinone Methides in Oil-Water Phases: Enantioselective Synthesis of Triarylmethanes
An efficient enantioselective Friedel–Crafts alkylation reaction of electron‐rich β‐naphthol with in situ generated ortho‐quinone methides catalyzed by chiral bifunctional amine‐squaramide catalysts has been developed. The chiral triarylmethane derivatives were obtained in good to high yields (up to 97% yield) with high enantioselectivities (up to 97% ee) for most substrates under mild conditions.
A novel diastereodivergent tricyclization of isocyanoacetates with o-quinone methides was accomplished for the efficient synthesis of chromeno[2,3-b]chromene derivatives. All three reactive centers of isocyanoacetate reacted sequentially with two o-QMs, affording the products with four adjacent stereocenters in a diastereoselective manner. The asymmetric version was preliminarily investigated.
为了有效合成色烯[2,3- b ]色烯衍生物,完成了异氰基乙酸酯与邻醌甲基化物的新型非对映异构三环化反应。异氰基乙酸酯的所有三个反应中心依次与两个o -QM 反应,以非对映选择性的方式提供具有四个相邻立体中心的产物。对不对称版本进行了初步研究。