The two-phase oxidation of primary-secondary diols with sodium hypochlorite, mediated by TEMPO, brings about selective oxidation at the primary position. Such 5 diols are oxidized to the corresponding hydroxyaldehydes.
Chlebicki, Jan; Cichacz, Zbigniew, Polish Journal of Chemistry, 1986, vol. 60, # 4-6, p. 485 - 494
作者:Chlebicki, Jan、Cichacz, Zbigniew
DOI:——
日期:——
SIEDLECKA, RENATA;SKARZEWSKI, JACEK;MLOCHOWSKI, JACEK, TETRAHEDRON LETT., 31,(1990) N5, C. 2174-2180
作者:SIEDLECKA, RENATA、SKARZEWSKI, JACEK、MLOCHOWSKI, JACEK
DOI:——
日期:——
CHEMICAL ADDITIVES FOR WATER FLUX ENHANCEMENT
申请人:LG NANOH2O, INC.
公开号:US20170014779A1
公开(公告)日:2017-01-19
Provided are flux enhancing inclusion complexes for preparing highly permeable thin film composite membranes, and processes that include adding the flux enhancing inclusion complexes to the organic phase or aqueous phase prior to interfacial polymerization of the thin film composite membrane. The thin film composite membranes are suitable for nanofiltration, and reverse and forward osmosis. The provided processes can include contacting a porous support membrane with an aqueous phase containing a polyamine to form a coated support membrane, and applying an organic phase containing a polyfunctional acid halide and a flux enhancing inclusion complex to the coated support membrane to interfacially polymerize the polyamine and the polyfunctional acid halide to form a discrimination layer to form thin film composite membranes.
Facile Oxidation of Sulfides to Sulfoxides using Sodium Hypochlorite and Oxoammonium Salt as a Catalyst: Chemo- and Diastereoselective Transformation of Bis(phenylthio)alkanes into Sulfoxides
作者:Renata Siedlecka、Jacek Skarżewski
DOI:10.1055/s-1994-25486
日期:——
A facile and selective method for the title transformation is described. The two-phase oxidation of disulfides with one or two equivalents of sodium hypochlorite mediated by TEMPO and co-catalyzed by potassium bromide and PTC leads to the corresponding mono- or disulfoxides, respectively. In the case of 1,2- 1,3-bis(phenylthio)alkanes and ortho-bis(phenylthiomethyl)benzene the respective meso disulfoxides are formed in 90-98% diastereoselectivity.
本文介绍了一种简便且具有选择性的方法来进行上述转化。在 TEMPO 的介导以及溴化钾和四氯化碳的共同催化下,二硫化物与一或两个当量的次氯酸钠发生两相氧化反应,分别生成相应的一硫醚或二硫醚。在 1,2- 1,3-双(苯硫基)烷烃和正交双(苯硫基甲基)苯的情况下,可生成相应的中二硫醚,非对映选择性为 90-98%。