By judicious choice of the counter anions in the vanadyl catalysts, we can achieve β-hydroxylated and t-butyl peroxylated carbonylation of styrenes by aromatic 1° and 2° alkyl aldehydes in a complementary manner.
Self-assembly of reverse micelle nanoreactors by zwitterionic polyoxometalate-based surfactants for high selective production of β‑hydroxyl peroxides
作者:Guicong Hu、Wen Chang、Sai An、Bo Qi、Yu-Fei Song
DOI:10.1016/j.cclet.2021.11.006
日期:2022.8
were applied for catalyzing the oxidation of styrene, an unprecedented β‑hydroxyl peroxide compound of 2‑hydroxyl-2-phenylethan-1‑tert-butylperoxide was produced in high selectivity of 95.2%. In comparison, the cetyltrimethylammonium electrostatically encapsulated POMs mainly generated the epoxides or 1,2-diols. A free radical mechanism was proposed for the oxidation reaction catalyzed by the zwitterionic
three-component reaction of alkenes, oxygen sources, and hydroperoxides mediated by ammonium iodine to α-oxyperoxidates has been developed. Mechanistic studies demonstrated that regioselective radical addition and subsequent SN2 nucleophilic substitution were possible for the formation of products. In addition to the traditional pathway of SN2 reaction, that is, where nucleophiles attack the α-C atoms at the
已经开发了由碘铵介导的烯烃、氧源和氢过氧化物到α-氧过氧化物的不同区域选择性三组分反应。机理研究表明,区域选择性自由基加成和随后的 S N 2 亲核取代对于产物的形成是可能的。除了 S N 2 反应的传统途径,即亲核试剂攻击背面的 α-C 原子外,还有一个不寻常的过渡构型,即 H 2 O 分子攻击正面的 α-C 原子。获得。
Oxygenation of alkenes with t-BuOOH catalysed by β-cyclodextrin borate
作者:Shridhar Bhat、Srinivasan Chandrasekaran
DOI:10.1016/0040-4039(96)00627-2
日期:1996.5
β-Cyclodextrinboratecatalysesoxygenation of aryl substituted alkenes in the presence of t-BuOOH to afford β-dioxy alcohols in good yields (63–86%).