在没有任何过渡金属催化剂或外部光敏剂的帮助下,实现了第一个由可见光促进的β-萘酚脱芳基氟烷基化反应。廉价的氟代烷基碘化物在非常温和的反应条件下直接用作有效的氟代烷基化试剂。发现该方法的范围是一般性的,范围很广,三氟甲基和全氟烷基(-C 4 F 9,-C 6 F 13和-C 8 F 17)以极高的收益进行安装。初步的机理研究表明,在无光催化剂的情况下,萘甲酸酯-氟代烷基碘的电子供体-受体(EDA)复合物中可见光促进了分子间的电荷转移。
Intermolecular Enantioselective Dearomatization Reaction of β-Naphthol Using<i>meso</i>-Aziridine: A Bifunctional In Situ Generated Magnesium Catalyst
作者:Dongxu Yang、Linqing Wang、Fengxia Han、Dan Li、Depeng Zhao、Rui Wang
DOI:10.1002/anie.201410257
日期:2015.2.9
A direct, facile, and highly diastereo‐ and enantioselectivedearomatizationreaction of β‐naphthol derivatives with aziridines has been developed for the first time. A newly designed Box–OH ligand was employed for an in situgeneratedmagnesiumcatalyst and proved to be efficient. The corresponding dearomatization product was transformed into a polycyclic scaffold and polyhydroxylated compound. 1H NMR
β-萘酚衍生物与氮丙啶的直接,简便,高度非对映和对映选择性脱芳香化反应已得到首次开发。一种新设计的Box-OH配体用于原位生成的镁催化剂,并被证明是有效的。将相应的脱芳香化产物转化成多环支架和多羟基化的化合物。1 H NMR研究揭示了β-萘酚脱芳香化过程的活化模式,并且在反应中观察到明显的正非线性效应,并提供了对Mg II中心周围的配位环境和可能的活性物质的见解。
Diversiform Reactivity of Naphthols in Asymmetric Dearomatization or O-Alkylation Reactions with Aziridines
作者:Linqing Wang、Dongxu Yang、Dan Li、Haiyong Zhu、Pengxin Wang、Xihong Liu、Lutao Bai、Rui Wang
DOI:10.1002/adsc.201801041
日期:2018.12.3
Here, we present a catalytic asymmetric and site‐selective reaction of naphthols, realizing diversiform reactions in asymmetricdearomatization or O‐alkylation with aziridines, and the reason for the switchable reactivity is formally analyzed with different type of substrates under different conditions.