Niacin as a Potent Organocatalyst towards the Synthesis of Quinazolines Using Nitriles as C-N Source
作者:Raghuram Gujjarappa、Nagaraju Vodnala、Velma Ganga Reddy、Chandi C. Malakar
DOI:10.1002/ejoc.201901651
日期:2020.2.21
An organocatalyzed protocol has been described for the comprehensive synthesis of 2‐substituted quinazolines usingnitriles as C–N source. The developed reaction conditions are suitable for a wide range of substrates providing the desired products in excellent yields.
The present invention relates to compounds of formula I
wherein
R, R
1
, R
2
, R
3
, R
4
, aryl, n, and m are as defined in the specification and pharmaceutically acceptable acid addition salts and tautomeric forms thereof. Such compounds have good activity on the 5-HT
5A
receptor. Therefore, the invention provides methods for the treatment of certain CNS disorders with such compounds.
Divergent Synthesis of Quinazolines Using Organocatalytic Domino Strategies under Aerobic Conditions
作者:Raghuram Gujjarappa、Suvik K. Maity、Chinmoy K. Hazra、Nagaraju Vodnala、Shiv Dhiman、Anil Kumar、Uwe Beifuss、Chandi C. Malakar
DOI:10.1002/ejoc.201800746
日期:2018.9.9
A convenient approach to the synthesis of 2‐substituted quinazolines is described based on an organocatalyticdomino reaction. Under the developed conditions, a wide range of substrates was explored, and the desired products were obtained in high yields.
SUBSTITUTION DERIVATIVES OF N6-BENZYLADENOSINE-5' -MONOPHOSPHATE, METHODS OF PREPARATION THEREOF, USE THEREOF AS MEDICAMENTS, AND THERAPEUTIC PREPARATIONS CONTAINING THESE COMPOUNDS
申请人:Zatloukal Marek
公开号:US20130040908A1
公开(公告)日:2013-02-14
Substitution derivatives of N
6
-benzyladenosine-5′-monophosphate of the general formula I, wherein (R)
n
represents 1 to 4 substituents (n is in the range 1-4), which can be the same or different, and R is selected from the group comprising C
1
to C
8
alkyl, C
1
to C
8
alkoxy, amino, halogen, hydroxy, mercapto and nitro groups, and the pharmaceutically acceptable salts thereof. A Method for their preparation, their use as medicaments and in other applications, and a therapeutic composition containing these derivatives is also disclosed.
The present invention relates to compounds of formula
wherein
R
1
, R
2
, and n are as defined herein and to pharmaceutically acceptable acid addition salts thereof.
The compounds of formula I have a good activity on the 5-HT
5A
receptor. Therefore, the invention provides the use of a compound of formula I for 5-HT
5A
receptor related diseases, such as anxiety, depression, sleep disorders and schizophrenia.