higher investment in the development of the corresponding syntheses. This approach requires the development of complex multistep reaction sequences on the solid phase. Employing the proteinphosphatase Cdc25 inhibitor dysidiolide as an example, we demonstrate that this goal can be achieved successfully. The reaction sequences developed led to dysidiolide analogues in overall 8-12 linear steps with
Stereoselective synthesis of (±)-β-elemene by a doubly diastereodifferentiating internal alkylation: a remarkable difference in the rate of enolization between syn and anti esters
作者:Deukjoon Kim、Jongkook Lee、Jiyoung Chang、Sanghee Kim
DOI:10.1016/s0040-4020(00)01130-3
日期:2001.2
A total synthesis of the sesquiterpene (±)-β-elemene (1) has been achieved starting from a simple acyclic precursor 4. Key transformations include a ‘doubly diastereodifferentiating folding and allylicstrain-controlled’ intramolecular ester enolate alkylation. In the course of the synthesis, we encountered remarkably different reactivity between syn and anti diastereomeric esters in the enolization
COMPOSITION AND METHOD FOR REMOVING OR PREVENTING THE APPEARANCE OF FABRIC STAINS
申请人:Molécula Principal - Lda
公开号:EP3754005A1
公开(公告)日:2020-12-23
The present disclosure relates to a composition and method for removing or preventing the appearance of spots or stains in fabrics that comprises the following components: aqueous solvent or an alcohol; an ion exchange salt selected from the following list: sodium bicarbonate, sodium carbonate, calcium chloride, sodium chloride, sodium percarbonate, sodium silicate, sodium carbonate, sodium metasilicate, or mixtures thereof; or mixtures thereof; a base or an acid for degradation of the organic matter; a remover of textile fibre aggregates; a surfactant agent; and optionally a preservative agent.
Aqueous cleaning composition comprising an ethoxylated alcohol/ethoxylated cationic surfactant mixture
申请人:GUARD IT SOLUTIONS PTY LTD
公开号:US11261405B2
公开(公告)日:2022-03-01
The present invention broadly relates to aqueous cleaning compositions and the use thereof in cleaning soiled surfaces.
本发明广泛涉及水性清洁组合物及其在清洁污垢表面中的使用。
Photocatalytic composition
申请人:——
公开号:US20040198625A1
公开(公告)日:2004-10-07
Cleaning compositions including a photocatalytic material and a sensitiser employ a photocatalytic material and a sensitiser at a locus, for example on a surface. The residue combats soils and/or undesired microorganisms at the locus. The photocatalytic material is peroxo modified titania, preferably in its anatase form, or peroxo modified titanic acid, or a mixture thereof. The compositions are preferably alkaline.