Antimuscarinic 3-(2-Furanyl)quinuclidin-2-ene Derivatives: Synthesis and Structure−Activity Relationships
摘要:
A series of 25 derivatives of the muscarinic antagonist 3-(2-furanyl)quinuclidin-2-ene (4) was synthesized and evaluated for muscarinic and antimuscarinic properties. Substitution at all three positions of the furan ring has been investigated. The affinities of the new compounds were determined by competition experiments in homogenates of cerebral cortex, heart, parotid gland, and urinary bladder from guinea pigs using (-)-[H-3]-3-quinuclidinyl benzilate as the radioligand, and the antimuscarinic potency was determined in a functional assay on isolated guinea pig urinary bladder using carbachol as the agonist. Several of the novel derivatives displayed high muscarinic affinities. Whereas the affinity of lead compound 4 for cortical muscarinic receptors is moderate (K-i 300 nM), it is much higher for the 6-methyl (49; K-i = 12 nM), 5-ethyl (52; K-i = 7.4 nM), 5-bromo (33; K-i = 6.4 nM), and 3-phenyl (49; K-i = 2.8 nM) substituted derivatives. The substituent-induced increases in affinity do not appear to be additive as a 5-bromo-3-phenyl (54), and a 5-methyl-3-phenyl (55) substitution pattern only slightly increases affinity (K-i = 1.55 and 2.39 nM, respectively). The conformational preferences of the 3-phenyl (49) and 5-phenyl (51) derivatives were studied by X-ray crystallography and molecular mechanics calculations. Because of the observed high affinity of 49, a series of 16 meta-and para-substituted analogues of 49 was synthesized and tested. derivative (68) exhibited more than 10-fold improvement in affinity as compared to 49. The structure-activity relationships of the new series are well described with QSAR and CoMFA models.
High-Load, Soluble Oligomeric Carbodiimide: Synthesis and Application in Coupling Reactions
作者:Mianji Zhang、Punitha Vedantham、Daniel L. Flynn、Paul R. Hanson
DOI:10.1021/jo048870c
日期:2004.11.1
A facile preparation of a high-load, soluble oligomeric alkyl cyclohexylcarbodiimide (OACC) reagent via ROM polymerization from commercially available starting materials is described. This reagent is exploited as a coupling reagent for esterification, amidation, and dehydration of carboxylicacids (aliphatic and aromatic) with an assortment of alcohols (aliphatic primary, secondary, and benzylic),
NOVEL HETEROCYCLIC DERIVATIVES AS M-GLU5 ANTAGONISTS
申请人:Leonardi Amedeo
公开号:US20090042841A1
公开(公告)日:2009-02-12
This invention relates to novel heterocyclic compounds having selective affinity for the mGlu5 subtype of metabotropic receptors, pharmaceutical compositions thereof and uses for such compounds and compositions in the treatment of lower urinary tract disorders, such as neuromuscular dysfunction of the lower urinary tract, and in the treatment of migraine and gastroesophagael reflux disease (GERD).
This invention relates to novel heterocyclic compounds having selective affinity for the mGlu5 subtype of metabotropic receptors, pharmaceutical compositions thereof and uses for such compounds and compositions in the treatment of lower urinary tract disorders, such as neuromuscular dysfunction of the lower urinary tract, and in the treatment of migraine and gastroesophagael reflux disease (GERD).
REDUCTION OF THE 2-NITROPHENYL ESTERS OF CERTAIN ACIDS
作者:L. CHAS. RAIFORD、WILLIAM G. HUEY
DOI:10.1021/jo01206a011
日期:1941.11
Rai, Usha Kumari; Mishra, S K; Shanker, Brija, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1993, vol. 32, # 6, p. 618 - 623
作者:Rai, Usha Kumari、Mishra, S K、Shanker, Brija、Singh, Sujan、Rao, R Balaji