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33996-33-7

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Prange et al.
p. 104,108
(1974)
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Process for the preparation of teneligliptin
A process for the preparation of teneligliptin.
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Page/Page column 28

(2017/01/02)

Energetic contribution to both acidity and conformational stability in peptide models
The acidity of N-acyl amino acids is dependent upon the rotameric state of the amide bond. In this work we systematically investigated the acidity difference of the rotamers (ΔpKa) in the frames of various acetylated amino acids. Our results indicated a mutual interaction of two carbonyl groups of an attractive type. We observed conservative ΔpKas for acyclic amino acids (2.2-3.0 kJ mol-1), whereas in the case of alicyclic amino acids, the experimental values revealed a strong dependency on the structural context (1.5-4.4 kJ mol-1). In homologous amino acids (α-, β-, γ-, etc.), the strength of the attraction decays in an exponential fashion. Furthermore, the interaction can accumulate through a chain of amide bonds in a cascade fashion, as demonstrated by an Ac-Pro-Pro dipeptide. As a result, we demonstrate that ΔpKa is an experimental parameter to estimate increments in the carbonyl-carbonyl alignment, as determined by the amino acid or peptidyl context. This parameter is also important in understanding the roles of amino acids in both protein folding and translation in biological systems as well as their evolutionary appearance in the genetic code.
Kubyshkin, Vladimir,Durkin, Patrick,Budisa, Nediljko
supporting information
p. 5209 - 5220
(2016/07/06)

BIOSYNCHRONOUS TRANSDERMAL DRUG DELIVERY
Systems and methods for treating diseases, addictions and disorders in humans and animals involving synchronizing and tailoring the administration of drug compounds with the body's natural circadian rhythms, in order to counteract symptoms when they are likely to be at their worst. Automated and pre programmable transdermal drug administration system are used. This system can also utilize a pump or pressurized reservoir, and/or a system for removing depleted carrier solution, or other modulated dispensing actuator, in conjunction with micro-fabricated structures commonly referred to as Micro-needles, or heat, or iontophoresis, sonophoresis, or a wide range of chemical permeation enhancers.
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(2008/06/13)

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Chemical Properties

Appearance/Colour :White fine crystals
Melting Point: 132-133 °C (dec.)(lit.)
Boiling Point: 442.1 °C at 760 mmHg
Flash Point:221.2 °C
Density: 1.439 g/cm³
Storage Temp.:Store at RT.
Vapor Pressure: 0mmHg at 25°C
Refractive Index: 1.4490 (estimate)
PKA: 3.48±0.40(Predicted)
Merck: 14,6903
BRN: 84043
PSA: 77.84000
LogP: -1.00940

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