39477-86-6Relevant articles and documents
Asymmetric Hydroesterification of Diarylmethyl Carbinols
Tian, Duanshuai,Xu, Ronghua,Zhu, Jinbin,Huang, Jianxun,Dong, Wei,Claverie, Jerome,Tang, Wenjun
supporting information, p. 6305 - 6309 (2021/02/09)
An efficient asymmetric hydroesterfication of diarylmethyl carbinols is developed for the first time with a Pd-WingPhos catalyst, resulting in a series of chiral 4-aryl-3,4-dihydrocoumarins in excellent enantioselectivities and good yields. The method features mild reaction conditions, a broad substrate scope, use of easily accessible starting materials, and low palladium loadings. A plausible stereochemical model is also proposed with the Pd-WingPhos catalyst. This method has enabled a 4-step asymmetric synthesis of (R)-tolterodine from readily available starting materials.
B(C6F5)3-Catalyzed Hydroarylation of Terminal Alkynes with Phenols
Huang, Jin,Huang, Liangbin,Jiang, Huanfeng,Lu, Changhui,Zhou, Jiaming
supporting information, p. 3962 - 3967 (2021/07/26)
We developed a B(C6F5)3 catalyzed hydroarylation of terminal alkynes with various phenols at room temperature without adding any additives, leading to the synthesis of 2-gem-vinylphenols with good regio-selectivity. Those transformations featured a broad substrate scope with moderate yields. Mechanism studies indicated that those transformations proceeded through the activation of phenol by B(C6F5)3 with subsequent protonation of alkyne/Friedel-Crafts-type reaction. (Figure presented.).
Practical, Large-Scale Preparation of Benzoxepines and Coumarins through Rhodium(III)-Catalyzed C-H Activation/Annulation Reactions
Gulías, Moisés,Marcos-Atanes, Daniel,Mascare?as, José L.,Font, Marc
supporting information, p. 1669 - 1673 (2019/09/04)
Herein we disclose the assembly of benzoxepines and coumarins from 2-alkenylphenol precursors using [Cp*RhCl2]2 as the precatalyst and alkynes or carbon monoxide as reacting partners. The preparation of benzoxepines and coumarins can be scaled up to 33 mmol using low catalyst loadings.