293744-26-0

Upstream product

• 615-36-1 2-bromoaniline 
• 280115-99-3 tert-butyl 4-(chlorocarbonyl)-piperidine-1-carboxylate 
• 84358-13-4 N-[(tert-butoxy)carbonyl]piperidine-4-carboxylic acid 

Downstream Products

• 293744-31-7 tert-butyl 4-{[(benzyl)(2-bromophenyl)amino]carbonyl}piperidine-1-carboxylate 
• 497937-61-8 4-[allyl-(2-bromo-phenyl)-carbamoyl]-piperidine-1-carboxylic acid tert-butyl ester 
• 497937-60-7 4-[(2-bromo-phenyl)-methyl-carbamoyl]-piperidine-1-carboxylic acid tert-butyl ester 
• 916442-82-5 4-[(2-bromo-phenyl)-cyclohexylmethyl-carbamoyl]-piperidine-1-carboxylic acid tert-butyl ester 
• 916442-77-8 4-{(2-bromo-phenyl)-[2-(tetrahydro-pyran-2-yloxy)-ethyl]-carbamoyl}-piperidine-1-carboxylic acid tert-butyl ester 
• 252882-60-3 tert-butyl 2-oxo-1,2-dihydro-1'H-spiro[indole-3,4-piperidine]-1'-carboxylate 
• 293744-34-0 tert-butyl 1-benzyl-1,2-dihydro-2-oxospiro[3H-indole-3,4'-piperidine]-1'-carboxylate 

Relevant academic research and scientific papers

Whole cell screen based identification of spiropiperidines with potent antitubercular properties

Abstract Whole cell based screens to identify hits against Mycobacterium tuberculosis (Mtb), carried out under replicating and non-replicating (NRP) conditions, resulted in the identification of multiple, novel but structurally related spiropiperidines with potent antitubercular properties. These compounds could be further classified into three classes namely 3-(3-aryl-1,2,4-oxadiazol-5-yl)-1′-alkylspiro[indene-1,4′-piperidine] (abbr. spiroindenes), 4-(3-aryl-1,2,4-oxadiazol-5-yl)-1′-alkylspiro[chromene-2,4′-piperidine] (abbr. spirochromenes) and 1′-benzylspiro[indole-1,4′-piperidin]-2(1H)-one (abbr. spiroindolones). Spiroindenes showed ≥4 log10 kill (at 2-12 μM) on replicating Mtb, but were moderately active under non replicating conditions. Whole genome sequencing efforts of spiroindene resistant mutants resulted in the identification of I292L mutation in MmpL3 (Mycobacterial membrane protein Large), required for the assembly of mycolic acid into the cell wall core of Mtb. MIC modulation studies demonstrated that the mutants were cross-resistant to spirochromenes but not to spiroindolones. This Letter describes lead identification efforts to improve potency while reducing the lipophilicity and hERG liabilities of spiroindenes. Additionally, as deduced from the SAR studies, we provide insights regarding the new chemical opportunities that the spiroindolones can offer to the TB drug discovery initiatives.

PYRIDYL PIPERIDINES

The invention provides novel substituted pyridyl piperidine compounds according to Formula (I) which are Wnt pathway inhibitors, their manufacture and use for the treatment of hyperproliferative diseases such as cancer, inflammatory or degenerative diseases.

ANTAGONISTS OF PGD2 RECEPTORS

Described herein are compounds and pharmaceutical compositions containing such compounds that antagonize the PGD2 activated chemoattractant receptor-homologous molecule expressed on TH2 cells (CRTH2). Also described herein are methods of using such CRTH2 antagonists, alone and in combination with other compounds, for treating respiratory, cardiovascular, and other PGD2-dependent or PGD2 mediated conditions or diseases.

Novel 3-spirocyclic indolyl derivatives useful as ORL-1 receptor modulators

The present invention is directed to novel 3-spirocyclic indolyl derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders and conditions modulated by the ORL-1 receptor.

Synthesis of heterocyclic compounds using radical reactions

A generalised radical reaction has been used to synthesise heterocyclic compounds which could serve as ligands for drug discovery. Attempt also have been made to rationalise the formation of oxidation products formed during TBTH reaction.

A convenient synthetic route to spiro[indole-3,4'-piperidin]-2-ones

Starting from 1-[(tert-butoxy)carbonyl]piperidine-4-carboxylic acid and 2-bromoaniline, the spiro[indole-3,4'-piperidin]-2-one system was obtained in three high-yielding steps: anilide formation, N(1)-protection, and intramolecular cyclization under Pd catalysis as the key reaction. The preparation of the corresponding 2-bromoanilide was studied. In extension, the same sequence was developed with 4-methyl- and 4-nitro-2-bromoaniline. In the key step, the NO2 group led to a rather diminished yield. The transformation of the protected spiro[indole-3,4'-piperidin]-2'one to the corresponding unprotected dihydroindoles is discussed.