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。
US4684393A
申请人:——
公开号:US4684393A
公开(公告)日:1987-08-04
US4723988A
申请人:——
公开号:US4723988A
公开(公告)日:1988-02-09
β-Selective C–H Arylation of Pyrroles Leading to Concise Syntheses of Lamellarins C and I
作者:Kirika Ueda、Kazuma Amaike、Richard M. Maceiczyk、Kenichiro Itami、Junichiro Yamaguchi
DOI:10.1021/ja508449y
日期:2014.9.24
The first generalβ-selectiveC-Harylation of pyrroles has been developed by using a rhodium catalyst. This C-Harylation reaction, which is retrosynthetically straightforward but results in unusual regioselectivity, could result in de novo syntheses of pyrrole-derived natural products and pharmaceuticals. As such, we have successfully synthesized polycyclic marine pyrrole alkaloids, lamellarins C