100516-76-5

Upstream product

• 7210-73-3 4-Methylthiazol-2-carbonsaeure-ethylester 
• 14542-15-5 methyl 4-methyl-1,3-thiazole-2-carboxylate 
• 14542-16-6 4-methyl-1,3-thiazole-2-carboxylic acid 

Downstream Products

• 103989-44-2 N-benzenesulfonyl-N'-(4-methyl-thiazole-2-carbonyl)-hydrazine 
• 31877-48-2 1-(4-methyl-thiazole-2-carbonyl)-4-phenyl-thiosemicarbazide 
• 13750-68-0 4-methyl-thiazole-2-carbaldehyde 
• 1429557-35-6 (R)-(8-methyl-3-(4-methylthiazol-2-yl)-5,6-dihydro-[1,2,4]-triazolo[4,3-a]pyrazin-7(8H)-yl)(4-(thiophen-2-yl)phenyl)methanone 
• 1429560-43-9 (8-methyl-3-(4-methylthiazol-2-yl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)(4-(thiophen-2-yl)phenyl)methanone 
• 1429560-37-1 2-(7-(4-methoxybenzyl)-8-methyl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazin-3-yl)-4-methylthiazole 
• 1254073-04-5 7-[(2,4-dichloro-3-fluorophenyl)carbonyl]-3-(4-methyl-1,3-thiazol-2-yl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrazine 
• 31877-54-0 5-(4-methyl-thiazol-2-yl)-4-phenyl-2,4-dihydro-[1,2,4]triazole-3-thione 

Relevant academic research and scientific papers

Discovery and Optimization of Novel Antagonists to the Human Neurokinin-3 Receptor for the Treatment of Sex-Hormone Disorders (Part I)

Neurokinin-3 receptor (NK3R) has recently emerged as important in modulating the tonic pulsatile gonadotropin-releasing hormone (GnRH) release. We therefore decided to explore NK3R antagonists as therapeutics for sex-hormone disorders that can potentially benefit from lowering GnRH pulsatility with consequent diminished levels of plasma luteinizing hormone (LH) and correspondingly attenuated levels of circulating androgens and estrogens. The discovery and lead optimization of a novel N-acyl-triazolopiperazine NK3R antagonist chemotype achieved through bioisosteric lead change from the high-throughput screening (HTS) hit is described. A concomitant improvement in the antagonist bioactivity and ligand lipophilic efficiency (LLE) parameter were the principal guidelines in the lead optimization efforts. Examples of advanced lead analogues to demonstrate the amenability of this chemotype to achieving a suitable pharmacokinetic (PK) profile are provided as well as pharmacokinetic-pharmacodynamic (PKPD) correlations to analyze the trends observed for LH inhibition in castrated rats and monkeys that served as preliminary in vivo efficacy models. (Chemical Presented).

NOVEL CHIRAL N-ACYL-5,6,7,(8-SUBSTITUTED)-TETRAHYDRO-[1,2,4]TRIAZOLO[4,3-a]PYRAZINES AS SELECTIVE NK-3 RECEPTOR ANTAGONISTS, PHARMACEUTICAL COMPOSITION, METHODS FOR USE IN NK-3 RECEPTOR MEDIATED DISORDERS AND CHIRAL SYNTHESIS THEREOF

The present invention relates to novel compounds of Formula I and their use in therapeutic treatments. The invention further relates to a novel chiral synthesis of 5,6,7,(8-substituted)-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazines using N-sp3 protective groups. The invention also provides intermediates for use in the synthesis of compounds of Formula I.

5,6,7,8-TETRAHYDRO[1,2,4]TRIAZOLO[4,3-a]PYRAZINE DERIVATIVES AS P2X7 MODULATORS

The present invention provides a compound of formula (I) or a pharmaceutically acceptable salt thereof wherein A is hydrogen, C1-4alkyl, C3-6cycloalkyl, C1-3alkoxy, C1-3alkoxy C1-4alkyl, C1-2fluoroalkyl, halogen, NR6 R7, optionally substituted heteroaryl (Het), or optionally substituted phenyl, and R1, R2, R3, R4, R5, R6 and R7 are as defined in the description. The compounds or salts are thought to modulate P2X7 receptor function and to be capable of antagonizing the effects of ATP at the P2X7 receptor. The invention also provides the use of the compound or salt in the treatment or prophylaxis of, for example, inflammatory pain, neuropathic pain, visceral pain, rheumatoid arthritis, osteoarthritis or neurodegenerative disorders.

Discovery of functionally selective 7,8,9,10-tetrahydro-7,10-ethano-1,2,4- triazolo[3,4-a]phthalazines as GABAA receptor agonists at the α3 subunit

We have previously identified the 7,8,9,10-tetrahydro-7,10-ethano-1,2,4- triazolo[3,4-a]phthalazine (1) as a potent partial agonist for the 0.3 receptor subtype with 5-fold selectivity in binding affinity over α1. This paper describes a detailed investigation of the substituents on this core structure at both the 3- and 6-positions. Despite evaluating a wide range of groups, the maximum selectivity that could be achieved in terms of affinity for the α3 subtype over the α1 subtype was 12-fold (for 57). Although most analogues showed no selectivity in terms of efficacy, some did show partial agonism at α1 and antagonism at α3 (e.g., 25 and 75). However, two analogues tested (93 and 96), both with triazole substituents in the 6-position, showed significantly higher efficacy for the α3 subtype over the α1 subtype. This was the first indication that selectivity in efficacy in the required direction could be achieved in this series.