CAS No.461432-26-8
Chemical Name:Dapagliflozin
SynonymsBMS5121458;Bms 512148;DAPAGLIFLOZIN;BMS-512148-05;Dag coluMn net;Dapagliflozin, >=98%;Dapagliflozin(BMS-512148);Dapagliflozin propanediol;Dapagliflozin Isomer Impurity;Dapagliflozin S1548 Selleck
CBNumber:CB91011730
Molecular Formula:C21H25ClO6
Formula Weight:408.875
Form:White Solid
Diabetes drugs
Dapagliflozin (ForxigaTM) is a new antidiabetic drug jointly developed by Bristol-Myers Squibb and AstraZeneca, being approved by the European Medicines Agency (EMA) on November 12, 2012. It is also the first approved SGLT2 inhibitor for the treatment of type II diabetes, being an important option in the treatment of diabetes, and is used to improve glycemic control as an adjunct to dietary and exercise for adults with type II diabetes.
Dapagliflozin is a sodium-glucose co-transporter 2 inhibitor. On January 8, 2014, the US Food and Drug Administration (FDA) have approved it for being used in the treatment of type II diabetes. Meanwhile, FDA requires the producers to conduct post-marketing research on drug-related risks.
The post-marketing trial requested by the FDA includes a cardiovascular outcome trial for assessing the cardiovascular risk for high-risk patients after treatment with dapagliflozin at baseline and a study to assess the risk of bladder cancer in recruited patients. Another study will assess the bladder tumor-promoting effect of this drug on rodent animals. Two studies will assess the pharmacokinetics, efficacy and safety of dapagliflozin in pediatric patients; a set of strengthened pharmacovigilance program will monitor liver abnormalities and pregnancy outcome reports in patients receiving daglitazone.Â
Pharmacological effects
Dapagliflozin works through inhibiting sodium-glucose transporter 2 (SGLT2), a protein in the kidney that reabsorbs glucose into the bloodstream. This allows extra glucose to be excreted through the urine, improving glycemic control without increasing insulin secretion. The use of this drug requires patients with normal renal function while patients of moderate to severe renal insufficiency should be disabled to use this drug. Single application of this product or combination with metformin, pioglitazone, glimepiride, insulin and other drugs can significantly reduce the HbA1c and fasting blood glucose of patients suffering type II diabetes. The frequency of the adverse reaction was similar to placebo with low risk of hypoglycemia, being able to reduce body weight.
The efficacy of dapagliflozin is comparable with the dipeptidyl peptidase inhibitors, and several new hypoglycemic drugs, and can also mildly lower the blood pressure and body weight. The drug has 5mg and 10mg two tablets to choose from, can be either used alone or together with insulin, including other diabetes drugs.
Pharmacokinetics
In healthy subjects, dapagliflozin was rapidly absorbed after oral administration with a peak time Tmax being 1 to 2 hours, a protein binding rate of 91%, an oral bioavailability of about 78% and a plasma terminal half-life of 12.9 hours. After oral administration, the drug is mainly metabolized by the uridine diphosphate glucuronosyltransferase 1A9 (UGT1A9) into the inactive metabolite in the liver with the smaller part being metabolized by the P450 enzyme and of no inhibitory or inducing effect on the P450 enzyme. Drug prototypes and related metabolites were excreted through urine (75%) and faeces (21%). Compare simultaneous administration of this product with high-fat food and with the fasting administration, Tmax can be extended by 1-fold, but the absorption did not affect the degree, so can be administrated together with the food.
The pharmacokinetics of daglitazone was significantly affected by renal function. Diabetic patients with mild, moderate or severe renal insufficiency are merged to be subject to oral administration of 20 mg • d-1 daglitazone for 7 days. The mean systemic exposure amount, compared with patients with normal renal function, is respectively 32%, 60% and 87% higher. For patients with normal renal function, mild insufficiency, moderate insufficiency and severe insufficiency, the urinary glucose excretion amount in 24 hours of steady state was 85, 52, 18 and 11g, successively.
Kasichayanula et al have studied the pharmacokinetic effects of liver dysfunction on daglitazone. The patients with mild, moderate and severe hepatic insufficiency having a single oral dose of 10 mg of daglitazone, the Cmax of each group was 12% lower, 12% higher and 40% higher than that with normal liver function, respectively. The AUC of each group was significantly higher than that of normal liver function by 3%, 36% and 67%.
Therefore, it is not recommended to apply daglitazone to patients of moderate and severe renal dysfunction. Severe liver dysfunction patients need to reduce the use of dose.
Synthesis method
5-bromo-2-chlorobenzoic acid is subject to acylating chlorination, and has Friedel-Crafts reaction with phenylethyl ether for reduction of its carbonyl group, generating 5-bromo-2-chloro-4'-ethoxydiphenyl methane, further subjecting to condensation with 2, 3, 4, 6-tetra-O-trimethylsilyl-D-glucopyranosanoic acid-1,5-lactone. The anomeric carbon hydroxyl group is subject to etherification and deprotection to give 2-chloro-5-(1-methoxy-D-glucopyranose-I-yl)-4'-ethoxydiphenylmethane, and then use Et3SiH/BF3 • OEt2 for reduction to remove methoxy, followed by acetic anhydride esterification and hydrolysis to give hypoglycemic agents daglitazone with the overall yield of about 40%.
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