ChemInform Abstract: Decarboxylative Fluorination of Aliphatic Carboxylic Acids via Photoredox Catalysis.

ChemInform ◽  
2015 ◽  
Vol 46 (42) ◽  
pp. no-no
Author(s):  
Sandrine Ventre ◽  
Filip R. Petronijevic ◽  
David W. C. MacMillan
2018 ◽  
Author(s):  
Erin Stache ◽  
Alyssa B. Ertel ◽  
Tomislav Rovis ◽  
Abigail G. Doyle

Alcohols and carboxylic acids are ubiquitous functional groups found in organic molecules that could serve as radical precursors, but C–O bonds remain difficult to activate. We report a synthetic strategy for direct access to both alkyl and acyl radicals from these ubiquitous functional groups via photoredox catalysis. This method exploits the unique reactivity of phosphoranyl radicals, generated from a polar/SET crossover between a phosphine radical cation and an oxygen centered nucleophile. We first show the desired reactivity in the reduction of benzylic alcohols to the corresponding benzyl radicals with terminal H-atom trapping to afford the deoxygenated product. Using the same method, we demonstrate access to synthetically versatile acyl radicals which enables the reduction of aromatic and aliphatic carboxylic acids to the corresponding aldehydes with exceptional chemoselectivity. This protocol also transforms carboxylic acids to heterocycles and cyclic ketones via intramolecular acyl radical cyclizations to forge new C–O, C–N and C–C bonds in a single step.


2015 ◽  
Vol 137 (17) ◽  
pp. 5654-5657 ◽  
Author(s):  
Sandrine Ventre ◽  
Filip R. Petronijevic ◽  
David W. C. MacMillan

2018 ◽  
Author(s):  
Erin Stache ◽  
Alyssa B. Ertel ◽  
Tomislav Rovis ◽  
Abigail G. Doyle

Alcohols and carboxylic acids are ubiquitous functional groups found in organic molecules that could serve as radical precursors, but C–O bonds remain difficult to activate. We report a synthetic strategy for direct access to both alkyl and acyl radicals from these ubiquitous functional groups via photoredox catalysis. This method exploits the unique reactivity of phosphoranyl radicals, generated from a polar/SET crossover between a phosphine radical cation and an oxygen centered nucleophile. We first show the desired reactivity in the reduction of benzylic alcohols to the corresponding benzyl radicals with terminal H-atom trapping to afford the deoxygenated product. Using the same method, we demonstrate access to synthetically versatile acyl radicals which enables the reduction of aromatic and aliphatic carboxylic acids to the corresponding aldehydes with exceptional chemoselectivity. This protocol also transforms carboxylic acids to heterocycles and cyclic ketones via intramolecular acyl radical cyclizations to forge new C–O, C–N and C–C bonds in a single step.


Synlett ◽  
2020 ◽  
Vol 31 (04) ◽  
pp. 363-368 ◽  
Author(s):  
Can Jin ◽  
Bin Sun ◽  
Tengwei Xu ◽  
Liang Zhang ◽  
Rui Zhu ◽  
...  

A visible-light-induced direct C–H alkylation of imidazo[1,2-a]pyridines has been developed. It proceeds at room temperature by employing inexpensive Eosin Y as a photocatalyst and alkyl N-hydroxyphthalimide (NHP) esters as alkylation reagents. A variety of NHP esters derived from aliphatic carboxylic acids (primary, secondary, and tertiary) were tolerated in this protocol, giving the corresponding C-5-alkylated products in moderate to excellent yields. Mechanistic studies indicate that a radical decarboxylative coupling pathway was involved in this process.


2015 ◽  
Vol 51 (59) ◽  
pp. 11864-11867 ◽  
Author(s):  
Xinxin Wu ◽  
Chunna Meng ◽  
Xiaoqian Yuan ◽  
Xiaotong Jia ◽  
Xuhong Qian ◽  
...  

We report herein an efficient, general and green method for decarboxylative fluorination of aliphatic carboxylicacids.


2003 ◽  
Vol 73 (11) ◽  
pp. 1792-1798 ◽  
Author(s):  
F. P. Maguna ◽  
M. B. Ninez ◽  
N. B. Okulik ◽  
E. A. Castro

2013 ◽  
Vol 54 (32) ◽  
pp. 4324-4326 ◽  
Author(s):  
Yasuharu Yoshimi ◽  
Sonoka Washida ◽  
Yoshiki Okita ◽  
Keisuke Nishikawa ◽  
Kousuke Maeda ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document