188111-79-7Relevant articles and documents
Asymmetric synthesis of a high added value chiral amine using immobilized ω-transaminases
Petri, Antonella,Colonna, Valeria,Piccolo, Oreste
, p. 60 - 66 (2019)
Chiral N-heterocyclic molecules and in particular compounds with an amino functional group such as 3-aminopiperidine are valuable intermediates for the production of a large number of bioactive compounds with pharmacological properties. In this paper, the synthesis of both enantiomers of 3-amino-1-Boc-piperidine by amination of the prochiral precursor 1-Boc-3-piperidone using immobilized ω-transaminases (TAs-IMB), isopropylamine as amine donor and pyridoxal-5’-phosphate (PLP) as cofactor is described. Compared to other methods, the present approach affords the target compound in just one step with high yield and high enantiomeric excess starting from a commercial substrate. The reaction was carried out by using different commercially available immobilized enzymes, evaluating the catalytic activity and the enantioselectivity under different experimental conditions. Re-use of the most efficient enzyme was performed both in batch and in a semi-continuous system. The selected biocatalyst showed good stability under the reaction conditions providing consistent results in terms of conversion and enantiomeric excess after several cycles. The reported results may be of practical interest in view of the development of this sustainable approach to an industrial scale.
Application of asymmetric hydrogenation in synthesis of Trelagliptin intermediate
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, (2018/09/21)
The invention provides a synthetic method of a compound Trelagliptin intermediate represented by a formula (1) (shown in the description). The synthetic method comprises the steps of carrying out a series of reactions on a starting material, namely a compound represented by a formula (1) (shown in the description) so as to finally obtain the compound by the formula (1), namely the Trelagliptin intermediate. Compared with a synthetic method of the Trelagliptin intermediate which comprises more synthetic steps and has a complex synthetic process in the prior art, the synthetic method provided by the invention is simple, feasible, relatively low in cost, relatively high in yield, relatively good in product quality and suitable for large-scale industrial production.
METHOD FOR PRODUCING OPTICALLY ACTIVE 3-AMINOPIPERIDINE OR SALT THEREOF
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Page/Page column 21, (2010/05/13)
The present invention relates to a method for producing an optically active 3-aminopiperidine or salt thereof. In the method, a racemic nipecotamide is stereoselectively hydrolyzed to obtain an optically active nipecotamide and an optically active nipecotic acid in the presence of an enzyme source derived from an organism, and then the optically active nipecotamide is derived into an optically active aminopiperidine or salt thereof by aroylation, Hofmann rearrangement, deprotection of the amino group and further deprotection; or the optically active nipecotamide is derived into an optically active aminopiperidine or salt thereof by selective protection with BOC, Hofmann rearrangement and further deprotection. It is possible by the present invention to produce an optically active 3-aminopiperidine or salt thereof useful as a pharmaceutical intermediate from an inexpensive and easily available starting material by easy method applicable to industrial manufacturing.
AMIDE DERIVATIVE
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Page/Page column 120, (2009/12/05)
The present invention relates to a compound of the formula (I) being useful as a renin inhibitor, or a pharmaceutically acceptable salt thereof. wherein R1a is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.; R1b is an optionally substituted C1-6 alkoxy, etc.; R1c is a hydrogen atom, an optionally substituted C1-6 alkoxy, etc.; R2 is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.; R3a, R3b, R3c and R3d are independently the same or different, and each is a group of the formula: -A-B (in which A is a single bond, -(CH2)sO-, - (CH2)sN(R4)CO-, etc., B is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.), etc.; R4 is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.; s is 0, etc.; and n is 1, etc.
3-substituted piperidines comprising urea functionality, and methods of use thereof
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, (2008/06/13)
One aspect of the present invention relates to novel heterocyclic compounds comprising urea functionality. A second aspect of the present invention relates to the use of the novel heterocyclic compounds comprising urea functionality as ligands for various cellular receptors, including opioid receptors, other G-protein-coupled receptors and ion channels. An additional aspect of the present invention relates to the use of the novel heterocyclic compounds comprising urea functionality as analgesics.