Carbamoylcholine homologs: synthesis and pharmacology at nicotinic acetylcholine receptors
摘要:
In a recent study, racemic 3-(N,N-dimethylamino)butyl-N,N-dimethylcarbamate (1) was shown to be a potent agonist at neuronal nicotinic acetylcholine receptors with a high selectivity for nicotinic over muscarinic acetylcholine receptors [Mol. Pharmacol. 64 (2003) 865-875]. Here we present the synthesis and pharmacological characterization of a series of analogs of 1, where the methyl group at C-3 has been replaced by different alkyl substituents. Ring systems have been incorporated into the carbon backbone of some of the molecules, or the amino group has been build into ring systems. Furthermore, the (+)- and (-)-enantiomers of I have been separated, and X-ray crystallography has revealed that (-)-1 possesses (S)-configuration. The compounds have been characterized pharmacologically at recombinant nicotinic receptor subtypes. The structure-activity relationship study has provided valuable insight into the mode of interactions of I and its analogs with neuronal nicotinic acetylcholine receptors. (C) 2004 Elsevier B.V. All rights reserved.
A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided.
A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
A compound which may be used for the prevention or treatment of respiratory diseases in which STAT 6 is concerned, particularly asthma, chronic obstructive pulmonary disease and the like is provided.
A pyrimidine derivative or a salt thereof, which has an arylamino or arylethylamino group which may be substituted with a specified substituent, at the 2-position, amino group substituted with benzyl group or the like, at the 4-position, and carbamoyl group which may be substituted, at the 5-position, is provided.
The pressure sensitive adhesive disclosed is based on a multifunctional cyanate ester component. Monofunctional cyanate ester components and structural modifiers are incorporated to tailor the thermal and mechanical properties. The presence of crosslinks in the cyanate ester-based system also enhances the solvent resistance. While many types of PSAs consist of multiple components, all contributing to one aspect of the PSA's performance, the cyanate ester PSA does not require the use of plasticizers or other additives to stabilize mechanical performance over a wide temperature range. The simplicity of the system eases processing and prevents the possibility of degradation of the material over time.
A cyanate ester elastomer is designed to be capable of withstanding a vacuum application such as space with low outgassing, have sufficient resistance to atomic oxygen, have high thermal stability, UV stability, low dielectric constant/loss, recover from elongation in excess of one hundred percent and elastomeric properties from -100 °C to 250 °C. When the cyanate ester elastomer is paired with other chemicals, it creates materials applicable as a seal, adhesive, or as an insulation material.
氰酸酯弹性体可在真空环境(如太空)下使用,且放气量小,对原子氧有足够的抵抗力,具有高热稳定性、紫外线稳定性、低介电常数/损耗,伸长恢复率超过 100%,在 -100 °C 至 250 °C 温度范围内具有弹性体特性。当氰酸酯弹性体与其他化学品配对使用时,可制成密封、粘合或绝缘材料。
Mannich; Handke; Roth, Chemische Berichte, 1936, vol. 69, p. 2122