PYRONE COMPOUNDS AND HERBICIDES COMPRISING THE SAME
申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:US20150274691A1
公开(公告)日:2015-10-01
The present invention provides a compound having an excellent efficacy for controlling weeds. A pyrone compound of formula (I):
wherein m is 1, 2 or 3; n is an integer of any one of 1 to 5; X represents O, S, S(O) or S(O)
2
; R
1
represents a hydrogen atom or a methyl group; R
2
and R
3
represents a hydrogen atom, an C
1-6
alkyl group and the like; R
4
represents an C
6-10
aryl group or a five- to six-membered heteroaryl group; G represents a hydrogen atom and the like; Z represents a halogen atom, a cyano group, a nitro group, a phenyl group, an C
1-6
alkyl group and the like;
is useful as an active ingredient for herbicides.
Remote participation during photooxidation at sulfur. Evidence for sulfurane intermediates
作者:E. L. Clennan、Kang Yang
DOI:10.1021/jo00042a031
日期:1992.7
The photooxidations of geminally substituted gamma-hydroxy sulfides results in formation of unusual oxidative elimination products. Detailed spectral data and the independent synthesis of a close analogue provide compelling evidence for the structures of these olefins. The formation of the olefins is attributed to decomposition of sulfurane intermediates. This conclusion is supported by a detailed kinetic study which separated the chemical, k(r), and physical, k(q), components to the overall deactivation of singlet oxygen. Those sulfides with the best geometry for sulfide-hydroxyl interaction are also the substrates which react most rapidly with singlet oxygen to give oxidation products. In addition, sulfone yields are in excess of 50% for the hydroxy-substituted sulfides but less than 5% for their hydrocarbon analogues. Several mechanisms that provide explanations for these unusually high sulfone yields are presented.
US9868714B2
申请人:——
公开号:US9868714B2
公开(公告)日:2018-01-16
Visible-Light-Mediated Alkylation of Thiophenols via Electron Donor–Acceptor Complexes Formed between Two Reactants
作者:Yi-Ping Cai、Fang-Yuan Nie、Qin-Hua Song
DOI:10.1021/acs.joc.1c01433
日期:2021.9.3
A metal-free, photocatalyst-free, photochemical system was developed for the direct alkylation of thiophenols via electrondonor–acceptor (EDA) complexes (KEDA = 145 M–1) between two reactants, N-hydroxyphthalimide esters as acceptors and thiophenol anions as donors, in the presence of a tertiary amine. The EDA complexes in the reaction system have a broad range of visible-light absorption (400–650
开发了一种无金属、无光催化剂的光化学系统,用于通过两种反应物之间的电子供体 - 受体 (EDA) 配合物 ( K EDA = 145 M –1 )直接烷基化苯硫酚,N-羟基邻苯二甲酰亚胺酯作为受体和苯硫酚阴离子作为供体,在叔胺的存在下。反应体系中的 EDA 配合物具有广泛的可见光吸收范围(400-650 nm),可以在阳光下有效触发反应。
[EN] PYRONE COMPOUNDS AND HERBICIDES COMPRISING THE SAME<br/>[FR] COMPOSÉS DE PYRONE ET HERBICIDES LES COMPRENANT
申请人:SUMITOMO CHEMICAL CO
公开号:WO2014058037A1
公开(公告)日:2014-04-17
The present invention provides a compound having an excellent efficacy for controlling weeds. A pyrone compound of formula (I): wherein m is 1, 2 or 3; n is an integer of any one of 1 to 5; X represents O, S, S(O) or S(O)2; R1 represents a hydrogen atom or a methyl group; R2 and R3 represents a hydrogen atom, an C1-6 alkyl group and the like; R4 represents an C6-10 aryl group or a five- to six- membered heteroaryl group; G represents a hydrogen atom and the like; Z represents a halogen atom, a cyano group, a nitro group, a phenyl group, an C1-6 alkyl group and the like; is useful as an active ingredient for herbicides.