- Supramolecular Storage and Controlled Photorelease of an Oxidizing Agent using a Bambusuril Macrocycle
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The oxidizing ability of peroxodisulfate upon complexation inside the Bambusuril macrocycle cavity is inhibited. This dianionic agent can be released on demand from its stable 1:1 complex in water (log Ka=6.9 m?1) by addition of a more strongly bound anion, such as iodide (log Ka=7.1 m?1), which can also be delivered in situ upon irradiation from a 4-hydroxyphenacyl iodide derivative with spatial and temporal precision. The oxidizing properties of peroxodisulfate ions liberated from the complex recover and can take part in subsequent chemical transformations.
- Torti, Edoardo,Havel, Václav,Yawer, Mirza A.,Ludvíková, Lucie,Babiak, Michal,Klán, Petr,Sindelar, Vladimir
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supporting information
p. 16768 - 16772
(2017/12/02)
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- The power of solvent in altering the course of photorearrangements
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A clean bifurcation between two important photochemical reactions through competition of a triplet state Type II H-abstraction reaction with a photo-Favorskii rearrangement for (o/p)-hydroxy-o-methylphenacyl esters that depends on the water content of the solvent has been established. The switch from the anhydrous Type II pathway that yields indanones to the aqueous-dependent pathway producing benzofuranones occurs abruptly at low water concentrations (~8%). The surprisingly clean yields suggest that such reactions are synthetically promising.
- Sebej, Peter,Lim, Bum Hee,Park, Bong Ser,Givens, Richard S.,Klan, Petr
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supporting information; experimental part
p. 644 - 647
(2011/04/15)
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- Aminoalkoxybenzoyl-benzofuran or benzothiophene derivatives, method of preparing same and compositions containing same
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Benzothiophenes and related compounds of formula (1), wherein A, B, Z are independently —CH═, —CR4═ or ═N—; X is —S—, —O—, —NH—, —NR2, —CH2—CH2—, CH2—CH2—CH2—, —CH2—O—; —OCH2—, —CH2—S—, —CO—, —SCH2—. —N═CR2— or —R2C═N—; Y is optionally substituted phenyl, alkyl, cycloalkyl, cycloalkenyl, heterocycle or bicyclic ring system; D is —CO—, CR2R3—, —CONH—, —NHCO—, —CR2(OH)—, —CONR2, NOR1 CH—NO2 N—CN —NR2—CO—, —C—, —C—, —C—; E is a single bond, optionally substituted phenyl, heterocycle; Z1 is —(CH2)p W(CH2)q—, —O(CH2)p CR5R6— or —O(CH2)p W(CH2)q; G is —NR7R8, (a), (b), (c), a 5- or 6-membered saturated, unsaturated or partially unsaturated and optionally substituted heterocycle or a bicyclic amine containing 5 to 12 carbon atoms either bridged or fused and optionally substituted and R is halogen, —NR2R3, —NHCOR2, —NHSO2R2, —CR2R3OH, —CONR2R3, —SO2NR2R3, OH, —OR1, —O—COR1; are estrogen agonists which are useful for treating syndromes and diseases caused by estrogen deficiency.
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