An efficient and general protocol for the decarboxylative cross-coupling of pyridazine-3-carboxylicacids with aryl-bromides has been described. This method provides a new avenue for the synthesis of 3-arylpyridazines via decarboxylative cross-coupling strategy by employing the dual-catalyst system of Pd(PPh3)4/Cu2O in the presence of Li2CO3 at 160 °C in DMA.
已经描述了哒嗪-3-羧酸与芳基溴化物的脱羧交叉偶联的有效且通用的方案。该方法为Pd(PPh 3)4 / Cu 2 O的双催化剂体系在160℃下Li 2 CO 3存在下通过Pd(PPh 3)4 / Cu 2 O双催化剂体系的合成提供了一种新的途径。 DMA。
Phenylpyridazine derivatives as ligands for gaba receptors
申请人:Blackaby Wesley
公开号:US20060235021A1
公开(公告)日:2006-10-19
A class of 4-phenylpyridazine derivatives of Formula (I), being selective ligands for GABA
A
receptors, in particular having high affinity for the α2 and/or α3 and or α5 subunit thereof, are accordingly of benefit in the treatment and/or prevention of adverse conditions of the central nervous system, including anxiety, convulsions and cognitive disorders.
Herbicidal thiophenesulfonamides and pyridinesulfonamides
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0165753A2
公开(公告)日:1985-12-27
Sulfonylurea derivatives of formula
wherein
B is a substituted thienyl or pyridyl group;
W is O or S;
R is H or CH3; and
A is a mono- or bicyclic heterocyclic group, e.g. pyrimidinyl or triazinyl;
and their agriculturally suitable salts, exhibit potent herbicidal activity. Some also show a plant growth regulant effect.
The novel compounds may be formulated into compositions for agricultural use in conventional manner. They may be made by a variety of synthetic routes, e.g. by reacting an appropriate sulfonyl isocyanate or isothiocyanate of formula BNCW with an appropriate heterocyclic amine HNR.A.
式中 B 是取代的噻吩基或吡啶基;W 是 O 或 S;R 是 H 或 CH3;A 是单环或双环杂环基团,如嘧啶基或三嗪基;以及它们的农用适 宜盐的磺酰脲衍生物具有强效除草活性,有些还显示出植物生长调节剂的作用。 这些新型化合物可按常规方法配制成农用组合物。 它们可通过多种合成路线制得,如将式 BNCW 的适当磺酰基异氰酸酯或异硫氰酸酯与适当的杂环胺 HNR.A 反应。
BOURGUIGNON J.; BECUE C.; QUEGUINER G., J. CHEM. RES. SYNOP., 1981, NO 4, 104-105 / J. CHEM. RES. MICROFICHE, 198+