How Much Does the Hybridization of a Carbon Atom Affect the Transmission of the Substituent Effect on the Chemical Shift?
作者:Eun Jeong Jeong、In-Sook Han Lee
DOI:10.1002/bkcs.10067
日期:2015.1
systematically examined to find out the substituent effect on the chemical shift. The values of the chemical shift of the carbonyl carbon showed an inverse correlation with the Hammett σ values, and the magnitude of the slope was the largest with the propiolates. The α carbons of acrylates and propiolates also showed an inverse correlation with much smaller values of the slopes than those of the carbonyl carbons;
1 H和13系统检查了丙酸,丙烯酸和丙酸的芳基酯的13 C NMR光谱,以了解取代基对化学位移的影响。羰基碳的化学位移值与Hammettσ值呈反比关系,且斜率的大小与丙酸酯的比值最大。丙烯酸酯和丙酸酯的α碳也显示出负相关,其斜率值比羰基碳小得多。但是那些丙酸的人绝对没有关联。但是,丙烯酸酯和丙酸酯的β碳与较大的斜率值呈正相关。斜率的符号和大小可以通过取代基电子效应通过键和空间的传递来理解。苯环的13 C化学位移值。
[EN] PYRAZOLOPYRIDINE AS ADENOSINE ANTAGONISTS<br/>[FR] COMPOSES DE PYRAZOLOPYRIDINE UTILES EN TANT QU'ANTAGONISTES D'ADENOSINE
申请人:FUJISAWA PHARMACEUTICAL CO
公开号:WO2000024742A1
公开(公告)日:2000-05-04
A pyrazolopyridine compound of formula (I),: wherein R1 is a phenyl having one or two substituent(s) selected from the group consisting of halogen, lower alkyl, halo(lower)alkyl, hydroxy, lower alkoxy and ar(lower)alkoxy; and R2 is a hydrogen or a lower alkyl, or a salt thereof. The pyrazolopyridine compound (I) and a salt thereof of the present invention are adenosine antagonists and are useful for the prevention and/or treatment of depression, dementia (e.g. Alzheimer's disease, cerebrovascular dementia, dementia accompanying Parkinson's disease, etc.), Parkinson's disease, anxiety, pain, cerebrovascular disease (e.g. stroke, etc.), heart failure, and the like.