Epoxidation of bromoallenes connects red algae metabolites by an intersecting bromoallene oxide – Favorskii manifold
作者:D. Christopher Braddock、James Clarke、Henry S. Rzepa
DOI:10.1039/c3cc46720a
日期:——
DMDO epoxidation of bromoallenes gives directly α,β-unsaturated carboxylic acids under the reaction conditions. Calculated (ÏB97XD/6-311G(d,p)/SCRF = acetone) potential energy surfaces and 2H- and 13C-labeling experiments are consistent with bromoallene oxide intermediates which spontaneously rearrange via a bromocyclopropanone in an intersecting bromoallene oxide â Favorskii manifold.
Enantioselective <i>N</i>-Alkylation of Indoles via an Intermolecular Aza-Wacker-Type Reaction
作者:Jamie R. Allen、Ana Bahamonde、Yukino Furukawa、Matthew S. Sigman
DOI:10.1021/jacs.9b01476
日期:2019.6.5
intermolecular and enantioselective aza-Wacker reaction is described. Using indoles as the N-source and a selection of alkenols as the coupling partners selective β-hydride elimination toward the alcohol was achieved. This strategy preserves the newly formed stereocenter by preventing the formation of traditionally observed enamine products. Allylic and homoallylic alcohols with a variety of functional groups
描述了分子间和对映选择性 aza-Wacker 反应的发展。使用吲哚作为 N 源和选择烯醇作为偶联伙伴,实现了对醇的选择性β-氢化物消除。该策略通过防止形成传统上观察到的烯胺产物来保留新形成的立体中心。具有多种官能团的烯丙醇和高烯丙醇以高对映选择性与反应相容。同位素标记实验支持这种新型 aza-Wacker 反应的合成氨基钯化机制。
[EN] METHOD AND COMPOSITION FOR WATER TREATMENT<br/>[FR] PROCÉDÉ ET COMPOSITION DE TRAITEMENT DE L'EAU
申请人:BROMINE COMPOUNDS LTD
公开号:WO2022118312A1
公开(公告)日:2022-06-09
The invention provides methods and compositions for the microbial control of water, in particular for eliminating planktonic and biofilm bacteria therefrom, using a bromine-based biocide in combination with a cis-2-alkenoic acid as an auxiliary agent which has been found to enhance the action of the biocide.
The invention provides a water-soluble metal working lubricant which is suitably employed particularly in press-working of aluminum material and which is excellent in both working properties and degreasing properties. The water-soluble metal working lubricant includes 85 mass % or less of water (A); 5 to 75 mass % of a metal salt of an organic carboxylic acid (B) wherein carboxylic acid residue has 8 or more carbon atoms in-total and the acid/alkali ratio by mole is 1:0.5 to 1.1; 1 to 50 mass % of at least one metal salt (C) selected from among an organic phosphate ester metal salt, an organic phosphite ester metal salt, an organic phosphonate metal salt, and an organic borate ester metal salt, each having an alkyl group having 8 or more carbon atoms in total; and 10 to 80 mass % of a non-ionic surfactant (D).