- Acceptorless Dehydrogenative Coupling of o-Aminobenzamides with the Activation of Methanol as a C1 Source for the Construction of Quinazolinones
-
A strategy for the synthesis of quinazolinones via acceptorless coupling of o-aminobenzamides with methanol has been accomplished in the presence of the metal-ligand bifunctional catalyst [Cp?Ir(2,2′-bpyO)(H2O)]. Notably, this research exhibited the potential of transition-metal-catalyzed activation of methanol as a C1 source for the construction of heterocycles.
- Li, Feng,Lu, Lei,Liu, Pengcheng
-
-
Read Online
- Synthesis and SAR optimization of quinazolin-4(3H)-ones as poly(ADP-ribose)polymerase-1 inhibitors
-
We have demonstrated that quinazolin-4(3H)-one, a nicotinamide (NI) mimic with PARP-1 inhibitory activity in the high micromolar range (IC50 = 5.75 μM) could be transformed into highly active derivatives with only marginal increase in molecular weight. Convenient one to two synthetic steps allowed us to explore extensive SAR at the 2-, and 5- through 8-positions of the quinazolin-4(3H)-one scaffold. Substitutions at the 2- and 8-positions were found to be most favorable for improved PARP-1 inhibition. The amino group at 8-position resulted in compound 22 with an IC50 value of 0.76 μM. Combination of the 8-amino substituent with an additional methyl substituent at the 2-position provided the most potent compound 31 [8-amino-2-methylquinazolin- 4(3H)-one, IC50 = 0.4 μM] in the present study. Compound 31 inhibited the proliferation of Brca1-deficient cells with an IC50 value of 49.0 μM and displayed >10-fold selectivity over wild type counterparts. Binding models of these derivatives within the active site of PARP-1 have further supported the SAR data and will be useful for future lead optimization efforts.
- Kulkarni, Shridhar S.,Singh, Satyakam,Shah, Janki R.,Low, Woon-Kai,Talele, Tanaji T.
-
-
Read Online
- Method of synthesizing quinazolinone derivative by using methanol as raw material
-
The invention discloses a method of synthesizing a quinazolinone derivative by using methanol as a raw material. The method comprises adding an anthranilamide derivative II, methanol III and an iridium metal complex in a reaction container; performing a reaction on the reaction mixture in a microwave reactor or under magnetic stirring at a temperature of 130 +/- 10 DEG C for 2 hours or more; performing cooling to a room temperature; removing a solvent in a spin drying manner; and performing column separation to obtain a target compound. The method provided by the invention adopts nontoxic and renewable methanol as a raw material, and the by-products in the reaction are hydrogen gas and water, thus the method does not pollute the environment and meet the requirements of green chemistry, so that the method has a wide development prospect.
- -
-
Paragraph 0075; 0076; 0077; 0078
(2017/12/06)
-
- POLAR QUINAZOLINES AS LIVER X RECEPTORS ( LXRS ) MODULATORS
-
Disclosed are polar quinazoline-based modulators of Liver X receptors (LXRs) and related methods. The modulators include compounds of formula (I): INSERT FORMULA HERE AS IT APPEARS IN WRITTEN FORM IN THE SPECIFICATION (I) in which, R1, R2, R3, R4, R5, R6,
- -
-
Page/Page column 50
(2010/07/10)
-
- Quinazoline Compounds
-
Disclosed are quinazoline-based modulators of Liver X receptors (LXRs) and related methods. The modulators include compounds of formula (I): in which R1, R2, R3, R4, R5, R6, R7,
- -
-
Page/Page column 36
(2010/12/26)
-
