Palladium‐Catalyzed Coupling of Propargylic Alcohols with Boronic Acids under Ambient Conditions
作者:Anni Qin、Hui Qian、Qin Chen、Shengming Ma
DOI:10.1002/cjoc.201900442
日期:2020.4
A highly efficient palladium‐catalyzed direct coupling of propargylic alcohols with organoboronic acids to synthesize tri‐ and tetra‐substituted allenes has been developed under mild reaction conditions. Many useful functional groups are tolerated in this process with high to excellent yields. Preliminary biological studies showed that several tri‐ and tetra‐substituted allenes exhibited potent anti‐diabetic
METHOD FOR DIRECTLY CONSTRUCTING TETRA-SUBSTITUTED ALLENIC ACID COMPOUND HAVING HIGH OPTICAL ACTIVITY
申请人:Fudan University
公开号:EP3896053A1
公开(公告)日:2021-10-20
The present invention discloses a method for directly constructing highly optically active tetrasubstituted allenic acid compounds, i.e., a one-step process for directly constructing highly optically active axially chiral tetrasubstituted allenic acid compounds by using tertiary propargyl alcohol, carbon monoxide and water as reactants in an organic solvent in the presence of palladium catalyst, chiral diphosphine ligand, monophosphine ligand and organic phosphoric acid. The method of the present invention has the following advantages: operations are simple, raw materials and reagents are readily available, the reaction conditions are mild, the substrate has high universality, the functional group has good compatibility, and the reaction has high enantioselectivity (90%∼> 99% ee). The highly optically active allenic acid compounds obtained by the present invention can be used as an important intermediate to construct γ-butyrolactone compounds containing tetrasubstituted chiral quaternary carbon centers, tetrasubstituted allenic alcohol and other compounds.
[EN] METHOD FOR DIRECTLY CONSTRUCTING TETRA-SUBSTITUTED ALLENIC ACID COMPOUND HAVING HIGH OPTICAL ACTIVITY<br/>[FR] PROCÉDÉ DE CONSTRUCTION DIRECTE D'UN COMPOSÉ D'ACIDE ALLÉNIQUE TÉTRA-SUBSTITUÉ AYANT UNE ACTIVITÉ OPTIQUE ÉLEVÉE<br/>[ZH] 一种直接构建高光学活性四取代联烯酸类化合物的方法