Ruthenium-catalyzed ortho-arylation of acetanilides with aromatic boronic acids: an easy route to prepare phenanthridines and carbazoles
作者:Ravi Kiran Chinnagolla、Masilamani Jeganmohan
DOI:10.1039/c3cc49398a
日期:——
A regioselective ruthenium-catalyzed ortho-arylation of acetanilides with aromatic boronic acids is described. Later, ortho-arylated acetanilides were converted into phenanthridine and carbazole derivatives.
This invention provides pyrimidine derivatives represented by a formula,
in the formula, ring A stands for carbocyclic group or heterocyclic group,
X
1
stands for hydrogen, lower alkyl, amino, etc.,
X
2
stands for hydrogen or lower alkyl, Y stands for a direct bond or sulfur or nitrogen, n stands for an integer of 0-4, and
Ar stands for a group of the following formula,
or a salt thereof, which concurrently exhibit 5-HT
1A
agonistic activity and 5-HT
3
antagonistic activity and are useful for therapy and treatments of diseases such as IBS.
The invention furthermore provides a therapeutic method of IBS, characterized by having 5-HT
1A
agonistic activity and 5-HT
3
antagonistic activity work simultaneously and cooperatively in vivo, which comprises either administering 5-HT
3
antagonistic agent which concurrently exhibits 5-HT
1A
agonistic activity, or administering 5-HT
1A
agonistic agent and 5-HT
3
antagonistic agent simultaneously, in sequence or at an interval.
Electrochemical Decarboxylative Cyclization of α‐Amino‐Oxy Acids to Access Phenanthridine Derivatives
作者:Yanling Zhan、Changhui Dai、Zitong Zhu、Ping Liu、Peipei Sun
DOI:10.1002/asia.202101388
日期:2022.3.14
compounds found in pharmaceuticals and natural products. Herein, an efficient electrochemical decarboxylative cyclization of α-amino-oxy acids to synthesize phenanthridine derivatives was developed. This reaction proceeded through iminyl radical formation cascade intramolecular cyclization from readily available materials under transition-metal-free and mild conditions.