在水溶液中测量了20种碳氢化合物对葫芦[8] uril的内壁和与辅助客体连接的甲苯基单元形成的腔的亲和力。葫芦[8] uril和辅助客体,带有三氟甲基19 F NMR探针的取代钌三(2,2'-联吡啶)络合物,对环烃,尤其是顺式和反式十氢化萘显示出极好的选择性。与π-π相互作用不同,CH-π相互作用以及烃溶剂化的差异对识别过程有很大的贡献。
Substituent Effects on Photochemical Hydrogen Abstraction in 2-Acylpyridines, 2-Acylpyrazines, and 4-Acylpyrimidines
摘要:
Stern-Volmer quenching of the photochemistry of 1c indicates that N- and O-abstraction (eqs 1 and 2, respectively) are quenched at different rates (Figure 1). For quenching of 2c k(q) tau is 157 M(-1) and for 3c, 64 M(-1). When 1c is sensitized with triplet sensitizers of increasing E(T), N-abstraction increases (Table 1). These data indicate that N- and O-abstraction in 1c take place from distinguishable triplet states. Survey of Phi(p)'s of ring-substituted ketones 1b-d, 6d, 7a,b,d, 8b, 9b,d, 10b, and 11d demonstrates the effect of substitution on the competition between N- and O-abstraction (Table 2). For methyl- and diacyano-substituted ketones, the results can be understood simply in terms of shifts in E(T) of the n pi* and pi pi* states of the heterocycle. The photochemistry of all these ketones requires consideration of interactions among three triplet states.
[EN] USE OF STROBILURIN TYPE COMPOUNDS FOR COMBATING PHYTOPATHOGENIC FUNGI CONTAINING AN AMINO ACID SUBSTITUTION F129L IN THE MITOCHONDRIAL CYTOCHROME B PROTEIN CONFERRING RESISTANCE TO QO INHIBITORS VIII<br/>[FR] UTILISATION DE COMPOSÉS DE TYPE STROBILURINE POUR LUTTER CONTRE DES CHAMPIGNONS PHYTOPATHOGÈNES, CONTENANT UNE SUBSTITUTION D'ACIDE AMINÉ F129L DANS LA PROTÉINE CYTOCHROME B MITOCHONDRIALE CONFÉRANT UNE RÉSISTANCE À DES INHIBITEURS QO VIII
申请人:BASF SE
公开号:WO2022033906A1
公开(公告)日:2022-02-17
The present invention relates to the use of strobilurin type compounds of formula I and the N-oxides and the salts thereof for combating phytopathogenic fungi containing an amino acid substitution F129L in the mitochondrial cytochrome b protein (also referred to as F129L mutation in the mitochondrial cytochrome b gene) conferring resistance to Qo inhibitors, and to methods for combating such fungi. The invention also relates to novel compounds, processes for preparing these compounds, to compositions comprising at least one such compound, and to seeds coated with at least one such compound.
Evidence for hydrogen abstraction mediated by discrete nitrogen and oxygen triplets in 4-trifluoromethyl-2-isovalerylpyridine
作者:C.Janakiram Rao、William C. Agosta
DOI:10.1016/s0040-4039(00)61682-9
日期:1993.10
Irradiation of 1b leads to abstraction of hydrogen by nitrogen and formation of 2b, as well as abstraction of hydrogen by oxygen and formation of 3b and 4b. Stern-Volmer quenching data and triplet sensitization experiments provide evidence that these reactions are mediated by two discrete nπ* triplet states: a carbonyl oxygen triplet, ET ∼70 kcal/mol, τ ∼13 ns, and a nitrogentriplet lying at somewhat higher
SUBSTITUTED-2-PHENYL-3-METHOXYPROPENOATES AS FUNGICIDES
申请人:ZENECA LIMITED
公开号:EP0586393A1
公开(公告)日:1994-03-16
NON-RETINOID ANTAGONISTS FOR TREATMENT OF AGE-RELATED MACULAR DEGENERATION AND STARGARDT DISEASE
申请人:Petrukhin Konstantin
公开号:US20150126494A1
公开(公告)日:2015-05-07
A method for treating a disease characterized by excessive lipofuscin accumulation in the retina in mammals afflicted therewith, comprising administering to the mammal an effective amount of a non-retinoid antagonist compound or a pharmaceutically acceptable salt thereof.