Description
Rosiglitazone maleate, belongs to a novel class of thiazolidine diones
launched for the treatment of non-insulin-dependent diabetes mellitus (NIDDM),
a disease characterized by a pancreatic β-cell defect and insulin resistance in
the liver and peripheral tissues. The racemic base can be obtained by
KnSvenagel condensation between 2, 4-thiazolidinedione and the corresponding
4-substituted benzaldehyde (itself prepared in 2 steps from 2-chloropyridine),
followed by reduction of the benzylidene. Rosiglitazone was shown to be a
potent agonist of peroxisome proliferator activated receptor-gamma (PPARgamma),
a nuclear receptor involved in the differentiation of adipose tissue,
without activating liver PPAR-alpha receptors. This activation of PPAR-gamma
could mediate the down-regulation of leptin gene expression. In animal models,
Rosiglitazone has been shown to normalize glucose metabolism and reduce the
exogenous dose of insulin needed to achieve glycemic control. In patients with
Type II diabetes, daily doses (4 or 8 mg) of Rosiglitazone significantly improved
blood sugar control without affecting cardiac structure or function.
Chemical Properties
White To Off-White Solid
Originator
SmithKline Beecham (US)
Uses
Insulin sensitizer; binds to peroxisome proliferator activated receptor gamma (PPAR- γ).
Uses
Thiazole alkanes antidiabetic drug
Uses
Thiazolidinediones (TZDs) are a group of structurally related peroxisome proliferator-activated receptor γ (PPARγ) agonists with antidiabetic actions in vivo. Rosiglitazone is a prototypical TZD that has served as a reference compound for this class. It is a potent and selective PPARγ ligand that binds to the PPARγ ligand-binding domain with a Kd value of 43 nM. It activates luciferase-based expression constructs PPARγ1 and PPARγ2 with EC50 values of approximately 30 nM and 100 nM, respectively. Rosiglitazone is active in vivo as an antidiabetic agent in the ob/ob mouse model, and has been used as an oral hypoglycemic agent in the treatment of type 2 diabetes in humans for many years.[Cayman Chemical]
Indications
Rosiglitazone maleate is an antihyperglycemic agent in the thiazolidinedione class. It is indicated for the treatment of patients with type 2 diabetes mellitus.
Brand name
Avandia (GlaxoSmithKline).
General Description
A thiazolidinedione compound that acts as an anti-diabetic agent and serves as a potent and selective agonist of peroxisome proliferator-activated receptor-g (PPARg) (Kd ~40 nM) in fat cells. Shown to reduce fatty acid uptake and ameliorate lipid metabolism and insulin resistance in animal models of type II diabetes. Reported to activate both a1- and a2-containing AMPK complexes. Unlike troglitazone, it does not induce the activity of P4503A4. Significantly improves the differentiation of C3H10T1/2 stem cells into adipocytes. Shown to block estrogen synthesis by interfering with androgen binding to aromatase, but without affecting aromatase mRNA or protein expression.
Synthesis
Example 3: Preparation of rosiglitazone maleate
93.3 g (261.0 mmol) of rosiglitazone base prepared in Example 2 and 36.4 g (313.2 mmol) of maleic acid were suspended in 510 mL of isopropanol. The suspension was heated to reflux temperature and held for 1 hour until the initial suspension was transformed into a clarified colorless solution. Subsequently, the solution was cooled to 10 °C and filtered using a Büchner funnel. The filter cake was washed with 200 mL of isopropanol to yield 105.0 g of crude rosiglitazone maleate (85% yield, 99.57% HPLC purity).
41.1 g (86.9 mmol) of the above crude solid was suspended with 1.7 g (14.5 mmol) of maleic acid in 200 mL of ethanol (the ratio of maleic acid to ethanol was about 13.5:1, i.e., 0.17 equivalents of maleic acid per 2.3 L of ethanol). The suspension was heated to reflux temperature and maintained for 20 minutes. After that, the solution was cooled to 65 °C and the crystal seed particles of the desired rosiglitazone maleate polymorph were added. The resulting suspension was further cooled to 0 °C and filtered using a Büchner funnel. The filter cake was washed with 50 mL of ethanol to give a final product of 39.5 g of rosiglitazone maleate (96% yield, 99.89% HPLC purity) with a melting point of 120.6-121.7°C.
References
1) Cantello et al. (1994), [[omega-(Heterocyclylamino)alkoxy]benzyl]-2,4-thiazolidinediones as potent antihyperglycemic agents; J. Med. Chem., 37 3977
2) Lehmann et al. (1995) An antidiabetic thiazolidinedione is a high affinity ligand for peroxisome proliferator-activated receptor gamma (PPARgamma); J. Biol. Chem., 270 12953
3) Wilson et al. (1996), The structure-activity relationship between peroxisome proliferator-activated receptor gamma agonism and the antihyperglycemic activity of thiazolidinediones; J. Med. Chem., 39 665
4) Haruya et al. (2012), PPARγ agonists induce a white-to-brown fat conversion through stabilization of PRDM16 protein; Cell Metab., 15 395
5) Ruiz-Ojeda et al. (2016), Cell Models and their Application for Studying Adipogenic Differentiation in Relation to Obesity: A Review; Int. J. Mol. Sci., 17 E1040
