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Showing posts with label taigeliejing. Show all posts
Showing posts with label taigeliejing. Show all posts

Thursday, 31 March 2016

Tianagliflozin IND filed by Tianjin Institute of Pharmaceutical research

taigeliejing, 6-deoxydapagliflozin
Molecular Formula:C21H25ClO5
Molecular Weight:392.8732 g/mol
IND Filing...Tianjin Institute of Pharmaceutical research
D-​Glucitol, 1,​5-​anhydro-​1-​C-​[4-​chloro-​3-​[(4-​ethoxyphenyl)​methyl]​phenyl]​-​6-​deoxy-​, (1S)​-


A SGLT-2 inhibitor potentially for the treatment of type 2 diabetes.

CAS N. 1461750-27-5
The structures of dapagliflozin and 6-deoxydapagliflozin (1)
,deletion of the 6-OH in the sugar moiety of dapagliflozin led to the discovery of a more potent SGLT2 inhibitor, 6-deoxydapagliflozin (1, ). In an in vitro assay, 1 was a more active SGLT2 inhibitor, with IC 50 = 0.67 nM against human SGLT2 (hSGLT2), as compared with 1.1 nM for dapagliflozin, leading to the identification of 1 as the most active SGLT2 inhibitor discovered so far in this field. Also in an in vivo assay, 1 also introduced more urinary glucose in a rat urinary glucose excretion test (UGE) and exhibited more potent blood glucose inhibitory activity in a rat oral glucose tolerance test (OGTT) than dapagliflozin.
Given the fact that 6-dexoydapagliflozin (1) is a very promising SGLT2 inhibitor that could be used to treat type 2 diabetes, led to preclinical trials
 Tianjin Institute Of Pharmaceutical Research,天津药物研究院
SPECTRAL DATA of Tianagliflozin
1 as a white solid (3.65 g, 93 %). R f = 0.35 (EtOAc);
m.p.: 148–149 °C;
1H NMR (400 MHz, DMSO-d 6): δ = 7.35 (d, 1H, J = 8.4 Hz), 7.25 (s, 1H), 7.18 (d, 1H, J = 8.0 Hz), 7.08 (d, 2H, J = 8.4 Hz), 6.81 (d, 2H, J = 8.4 Hz), 4.95 (d, 1H, J = 5.2 Hz, OH), 4.90 (d, 1H, J = 4.4 Hz, OH), 4.79 (d, 1H, J = 5.6 Hz, OH), 3.92–4.01 (m, 5H), 3.24–3.29 (m, 1H), 3.18–3.22 (m, 1H), 3.09–3.15 (m, 1H), 2.89–2.95 (m, 1H), 1.29 (t, 3H, J = 7.0 Hz, CH2 CH 3 ), 1.15 (d, 3H, J = 6.0 Hz, CHCH 3 ) ppm;
13C NMR (100 MHz, DMSO-d 6): δ = 156.85, 139.65, 137.82, 131.83, 131.16, 130.58, 129.52, 128.65, 127.14, 114.26, 80.71, 77.98, 75.77, 75.51, 74.81, 62.84, 37.55, 18.19, 14.62 ppm;
IR (KBr): v¯¯¯ = 3,564 (w), 3,385 (s), 2,981 (s), 2,899 (s), 2,861 (s), 1,613 (m), 1,512 (s), 1,477 (m), 1,247 (s), 1,102 (s), 1,045 (s), 1,012 (s) cm−1;
HR–MS: calcd for C21H29ClNO5 ([M + NH4]+) 410.1729, found 410.1724.
 CN 103864737
WO 2014094544
Figure imgf000032_0001
Figure imgf000028_0006
Figure imgf000029_0001
Figure imgf000030_0001
Figure imgf000030_0002
1 D1 -6 Optionally, the step (7 ') is the step (7') in place:
LS l- [4 - D (I- Dl- 6)
Figure imgf000041_0001
Figure imgf000041_0002
(DMSO-d 6, 400 MHz), δ 7.35 (d, 1H, J = 8.0 Hz), 7.28 (d, 1H, J '. 2.0 Hz), 7.17 (dd, IH, / = 2.0 Hz and 8.4 Hz), 7.05 (d, 2H, J: 8.8 Hz), 6.79 (d, 2H, 8.8 Hz): 4.924,95 (m, 2H), 4,81 (d, IH, 6,0 Hz), 3.93- 3.99 (m, 5H), 3,85 (d, 1H, J = 10,4 Hz), 3,66 (dd, IH, 5,2 Hz and 11,6 Hz), 3.17-3,28 (m, 3H), 3.02-3.08 (m: IH), 1.28 (t, 3H, J = 7,0 Hz), 0,80 (s, 9H), -0.05 (s, 3H), -0.09 (s, 3H) .
[0066] The added 100mL dried over anhydrous methanol 0. 5g of sodium metal, nitrogen at room temperature with stirring, until the sodium metal disappeared. Followed by addition of 5. 2g (10mmol) of compound 6, stirring was continued at room temperature for 3 hours. To the reaction system was added 5g strong acid cation exchange resin, stirred at room temperature overnight, the reaction mixture until pH = 7. The resin was removed by suction, and the filtrate evaporated to dryness on a rotary evaporator, the residue was further dried on a vacuum pump to give the product I-D1-6, as a white foamy solid.
 WO 2014139447
PATENT related
Med Chem. 2015;11(4):317-28.

Design of SGLT2 Inhibitors for the Treatment of Type 2 Diabetes: A History Driven by Biology to Chemistry.


A brief history of the design of sodium-dependent glucose cotransporter 2 (SGLT2) inhibitors is reviewed. The design of O-glucoside SGLT2 inhibitors by structural modification of phlorizin, a naturally occurring O-glucoside, in the early stage was a process mainly driven by biology with anticipation of improving SGLT2/SGLT1 selectivity and increasing metabolic stability. Discovery of dapagliflozin, a pioneering C-glucoside SGLT2 inhibitor developed by Bristol-Myers Squibb, represents an important milestone in this history. In the second stage, the design of C-glycoside SGLT2 inhibitors by modifications of the aglycone and glucose moiety of dapagliflozin, an original structural template for almost all C-glycoside SGLT2 inhibitors, was mainly driven by synthetic organic chemistry due to the challenge of designing dapagliflozin derivatives that are patentable, biologically active and synthetically accessible. Structure-activity relationships (SAR) of the SGLT2 inhibitors are also discussed.

Discovery of 6-Deoxydapagliflozin as a Highly Potent Sodium-dependent Glucose Cotransporter 2 (SGLT2) Inhibitor for the Treatment of Type 2 Diabetes

Keywords. Carbohydrates Drug research Hydrogenolysis Dapagliflozin SGLT2 inhibitor
The synthetic route to the target compound 1 is shown in Scheme 3. The starting material methyl 2,3,4-tri-O-benzyl-6-deoxy-6-iodo-α-d-glucopyranoside (3) was prepared from commercially available methyl α-d-glucopyranoside (2) according to a known method [5, 6].
Iodide 3 was reductively deiodinated to give 4 in 91 % yield under hydrogenolytic conditions using 10 % Pd/C as catalyst in the presence of Et3N as base in THF/MeOH at room temperature.
when the iodide 3 was treated with Barton–McCombie reagent (n-Bu3SnH/AIBN) [7] in toluene at room temperature no reaction occurred; however, when the reaction was carried out at elevated temperatures, such as reflux, a complex mixture formed with only a trace amount (3 %, entry 1) of the desired product 4.
When the iodide 3 was treated with LiAlH4 in THF at 0 °C to room temperature, another complex mixture was produced with only a trace amount (2 %, entry 2) of 4.
When Pd(OH)2 was used as the hydrogenolysis catalyst instead of 10 % Pd/C, the desired 4 was indeed formed (14 %, entry 4), but most of the starting material was converted to a few more polar byproducts, which were believed to result from the cleavage of at least one of the benzyl groups.
pdf available
Monatshefte für Chemie - Chemical Monthly
December 2013, Volume 144, Issue 12, pp 1903-1910
////////IND Filing, SGLT-2 inhibitor, type 2 diabetes, Tianagliflozin, taigeliejing, 6-deoxydapagliflozin, 1461750-27-5