Hydrophobic, low-loading and alkylated polystyrene-supported sulfonic acid for several organic reactions in water: remarkable effects of both the polymer structures and loading levels of sulfonic acidsElectronic supplementary information (ESI) available: Experimental details. See http://www.rsc.org/suppdata/ob/b3/b305622h/
Acetonyltriphenylphosphonium Bromide (ATPB): A Versatile Reagent for the Acylation of Alcohols, Phenols, Thiols and Amines and for 1,1-Diacylation of Aldehydes under Solvent-Free Conditions
作者:Abu T. Khan、Lokman H. Choudhury、Subrata Ghosh
DOI:10.1002/ejoc.200500066
日期:2005.7
A wide variety of alcohols, phenols, amines and thiols may easily be converted into the corresponding acetate derivatives by treatment with acetic anhydride (1.5–2.0 equivalents) in the presence of acetonyltriphenylphosphonium bromide (ATPB; 5 mol %) in good yields at room temperature. With the same precatalyst, both aliphatic and aromatic aldehydes can also be transformed into the corresponding gem-diacetates
[EN] PYRIDAZINONE COMPOUND AND HERBICIDE AND NOXIOUS ARTHROPOD CONTROLLING AGENT COMPRISING IT<br/>[FR] COMPOSÉ ET HERBICIDE À BASE DE PYRIDAZINONE ET AGENT DE LUTTE CONTRE LES ARTHROPODES NUISIBLES LE CONTENANT
申请人:SUMITOMO CHEMICAL CO
公开号:WO2012091156A1
公开(公告)日:2012-07-05
The present invention relates to a pyridazinone compound of the formula (I): wherein R1 represents hydrogen, a C1-6 alkyl group, and the like, R2 represents halogen, a cyano group, a nitro group, a C1-6 alkoxy group, and the like, G represents hydrogen, and the like, Z represents halogen, a cyano group, a nitro group, a C1-6 alkyl group, and the like, and n represents an integer of 1-5 useful as an active ingredient in a herbicideand a noxious arthropod controlling agent.
Novel thiol-terminated bent-core liquid crystals (LCs) are used to decorate gold nanoparticles. Thioacetate or xanthate/xanthogenate functional groups are used to effect the attachment of the LCs to the gold nanoparticles. Such bent-core decorated nanoparticles may be dissolved in bent-core liquid crystal host media to provide polarizable systems which respond quickly to applied electric fields and exhibit other interesting and useful optical and electro-optic behaviour.
The combination of (p-CF3C6H4)3PAuCl and AgOTf generates a powerful catalyst for the intramolecular cyclizations of readily available γ-hydroxyalkynones under mild conditions. The substituted 3(2H)-furanones are obtained in 55−94% yields. This method is also applicable to the preparation of 2,3-dihydro-4H-pyran-4-ones.
(p -CF 3 C 6 H 4)3 PAuCl和AgOTf的组合为在温和条件下易于获得的γ-羟基炔酮的分子内环化生成了强大的催化剂。取代的3(2 H)-呋喃酮的产率为55-94%。该方法也适用于制备2,3-二氢-4 H-吡喃-4-酮。
Modified molybdenum carbonyl species; excellent reagents for the desulphurization of thiols
作者:Howard Alper、Claude Blais
DOI:10.1039/c39800000169
日期:——
Thiols can be desulphurized in good yields by treatment with molybdenum hexacarbonyl either in acetic acid or when pre-adsorbed on to silica.