Photothérapie dynamique dans le cancer de la prostate à faible risque. Revue de la littérature

INTRODUCTION: Currently, about 50% of newly prostate cancers are localized and low-risk according to D\u27Amico risk classification. Focal therapies whose objective is to treat only the index lesion appear as a new alternative being evaluated in the management of these cancers. Besides the interest in the control of the disease, focal therapies present a very low risk of morbidity. Vascular targeted photodynamic therapy (VTP) is one of these new emerging therapies. METHOD: An exhaustive review concerning VTP in prostate cancer was carried out. A search by the following keywords "low-risk prostate cancer", "focal treatment", "vascular targeted photodynamic therapy" "TOOKAD" was carried out in Pubmed and Embase. RESULTS: In phase II studies, VTP showed a rate of 80% negative biopsies at 6 months, with good clinical tolerance. The European phase III, randomized prospective study, comparing VTP to active surveillance showed a lower proportion of progression, as well as a more significant duration before progression for VTP. The adverse events are mostly moderate and transient. The quality of life of patients is preserved, with a moderate impact on erectile and urinary functions. CONCLUSION: VTP appear to be a promising new approach in localized low-risk prostate cancer

Cationic (eta(6)-arene)tricarbonylmanganese linked to ferrocene complexes

Palladium-catalyzed Sonogashira coupling reactions of the neutral [eta(5)(1-5)-(1-chloro-4-methoxycyclohexa-2,4-dienyl)]tricarbonylmangane se(l) (2) and 2-bromo-5-{[eta(5)(1-5)-(4-methoxycyclohexa-2,4-dienylltricarbonylmangan ese(I)}thiophene (13) with the ethynylferrocene derivative 5 give the dinuclear complexes 1-(ferrocenylethynyl)[eta(5)(1-5)-(4-methoxycyclohexa2,4-dienyl)]tricarb onylmanganese(I) (6) and 2-(ferrocenylethynyl)-5-[eta(5)(1-5)-(4-methoxycyclohexa-2,4-dienyl)tric arbonylmanganese]thiophene (10). Similarly, condensation of 2 with 2-(ferrocenylethynyl)-5-ethynylthiophene (18) affords the dinuclear complex 19. These complexes are valuable precursors, upon hydride abstraction, of the corresponding eta(6)-arene cations 7, 11, and 20. The structure of one of them, 1-(ferrocenylethynyl)[eta(6)(1-6)-(4-methoxybenzene)]tricarbonylmanganes e(I) tetrafluoroborate (7), has been investigated by X-ray diffraction

Synthesis and reactivity of manganese tricarbonyl complexes of the centropolyindanes 10-methyltribenzotriquinacene and fenestrindane

Dullaghan CA, Carpenter GB, Sweigart DA, Kuck D, Fusco C, Curci R. Synthesis and reactivity of manganese tricarbonyl complexes of the centropolyindanes 10-methyltribenzotriquinacene and fenestrindane. ORGANOMETALLICS. 2000;19(11):2233-2236.The cationic manganese tricarbonyl moiety is readily coordinated to an arene ring of the centropolyindanes 10-methyltribenzotriquinacene (MTBT) and fenestrindane (FET) to afford [(MTBT)Mn(CO)(3)](+) (1) and [(FET)Mn(CO)(3)](+) (2). An X-ray structure of 1 shows that the metal is coordinated to the convex face of the MTBT ligand. Both 1 and 2 are electrophilically activated and readily undergo regioselective and stereoselective addition reactions with mild nucleophiles

One‐Step Chemo‐, Regio‐ and Stereoselective Reduction of Ketosteroids to Hydroxysteroids over Zr‐Containing MOF‐808 Metal‐Organic Frameworks

[EN] Zr-containing MOF-808 is a very promising heterogeneous catalyst for the selective reduction of ketosteroids to the corresponding hydroxysteroids through a Meerwein-Ponndorf-Verley (MPV) reaction. Interestingly, the process leads to the diastereoselective synthesis of elusive 17 alpha-hydroxy derivatives in one step, whereas most chemical and biological transformations produce the 17 beta-OH compounds, or they require several additional steps to convert 17 beta-OH into 17 alpha-OH by inverting the configuration of the 17 center. Moreover, MOF-808 is found to be stable and reusable; it is also chemoselective (only keto groups are reduced, even in the presence of other reducible groups such as C=C bonds) and regioselective (in 3,17-diketosteroids only the keto group in position 17 is reduced, while the 3-keto group remains almost intact). The kinetic rate constant and thermodynamic parameters of estrone reduction to estradiol have been obtained by a detailed temperature-dependent kinetic analysis. The results evidence a major contribution of the entropic term, thus suggesting that the diastereoselectivity of the process is controlled by the confinement of the reaction inside the MOF cavities, where the Zr4+ active sites are located.Financial support by the Spanish Government is acknowledged through projects MAT2017-82288-C2-1-P and the Severo Ochoa program (SEV-2016-0683). The Microscopy Service of the Universitat Politecnica de Valencia is gratefully acknowledged for the electron microscopy images.Mautschke, H.; Llabrés I Xamena, FX. (2021). One-Step Chemo-, Regio- and Stereoselective Reduction of Ketosteroids to Hydroxysteroids over Zr-Containing MOF-808 Metal-Organic Frameworks. Chemistry - A European Journal. 27(41):10766-10775. https://doi.org/10.1002/chem.2021009671076610775274