A catalyst-free multicomponent CDC reaction is rarely reported, especially for the intermolecular tandem CDC cyclization, which represents an important strategy for constructing cyclic compounds. Herein, a three-component tandem CDC cyclization by a Pummerer-type rearrangement to afford biologically relevant isoindolinones from aromatic acids, amides, and DMSO, is described. This intermolecular tandem reaction undergoes a C(sp(2) )-H/C(sp(3) )-H cross-dehydrogenative coupling, C-N bond formation, and intramolecular amidation. A notable feature of this novel protocol is avoiding a catalyst and additive (apart from oxidant).

A novel, efficient and reusable heterogeneous catalytic assembly of peroxophosphotungstate held in an ionic liquid brush was synthesized and an extraction and catalytic oxidative desulfurization (ECODS) procedure was developed for a model oil of benzothiophene (BT) and dibenzothiophene (DBT) using 30 wt% hydrogen peroxide as terminal oxidant and methanol as solvent under mild conditions. Several factors that affect sulfur removal were investigated in detail. The highest sulfur removal can reach 100% for BT in 7 h at 70°C when the molar ratio of H 2 O 2 , S and catalyst is 10:1:0.025. The sulfur removal for DBT can also reach 100% in 4 h at 50°C with the same molar ratio of H 2 O 2 , S and catalyst. The experimental results demonstrate that this ECODS process has no apparent scale-up effect. The catalyst can be easily recovered (via simple filtration) and recycled five times without a significant decrease in activity.

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A reusable heterogeneous catalytic assembly of [PO4{WO(O2)2}4]3− held in an ionic liquid brush was synthesized and an environmentally friendly procedure was developed for the dihydroxylation of several olefins with 30 wt% H2O2. These reactions were conducted in neat water under mild conditions without any organic co‐solvent or other additive. Several factors that affect the dihydroxylation were investigated in detail. The catalyst is easily recovered after the reaction via simple filtration, and can be reused at least eight times without a noticeable loss of activity. The experimental results demonstrate that this dihydroxylation process has no apparent scale‐up effect. Copyright © 2014 John Wiley & Sons, Ltd.

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