A Mild and Selective Method for the Catalytic Hydrodeoxygenation of Cyanurate Activated Phenols in Multiphasic Continuous Flow
摘要:
sA low-energy, high-selectivity approach to the catalytic hydrodeoxygenation of phenols is reported using batch or continuous flow methods to react 3 equiv of phenol with cyanuric chloride then hydrogenolyzing the triarylcyanurate intermediate to give 3 equiv of deoxo aromatic. The use of cyanuric chloride compares favorably with existing activation methods, showing improved scalability, atom efficiency, and economics. The scope of both the activation and hydrogenolysis stages are explored using lignin-related phenols. Initial development has identified that continuous stir tank reactors (CSTRs) enable a multiphasic process for converting guaiacol to anisole and at steady state overcome the catalyst deactivation issues observed in batch, seemingly caused by the cyanurate byproduct. Green chemistry aspects and the potential for industrial adoption are discussed.
The present invention relates to pharmaceutical compositions containing a compound represented by formula (I), or a pharmaceutically acceptable prodrug or salt thereof, or a hydrate or solvate thereof as an active ingredient,
(wherein,
R1, R2, R3, and R4 are the same as R1, R2, R3, and R4 in the description of the present invention).
The present invention relates to compounds represented by formula (I), or pharmaceutically acceptable prodrugs or salts thereof, or hydrates or solvates thereof,
(wherein,
R1, R2, R3, and R4 are the same as R1, R2, R3, and R4 in the description of the present invention).
A Mild and Selective Method for the Catalytic Hydrodeoxygenation of Cyanurate Activated Phenols in Multiphasic Continuous Flow
作者:Yuhan Zhao、Georgina King、Maria H.T. Kwan、A. John Blacker
DOI:10.1021/acs.oprd.6b00314
日期:2016.11.18
sA low-energy, high-selectivity approach to the catalytic hydrodeoxygenation of phenols is reported using batch or continuous flow methods to react 3 equiv of phenol with cyanuric chloride then hydrogenolyzing the triarylcyanurate intermediate to give 3 equiv of deoxo aromatic. The use of cyanuric chloride compares favorably with existing activation methods, showing improved scalability, atom efficiency, and economics. The scope of both the activation and hydrogenolysis stages are explored using lignin-related phenols. Initial development has identified that continuous stir tank reactors (CSTRs) enable a multiphasic process for converting guaiacol to anisole and at steady state overcome the catalyst deactivation issues observed in batch, seemingly caused by the cyanurate byproduct. Green chemistry aspects and the potential for industrial adoption are discussed.