Photochemical aryl radical cyclizations to give (E)-3-Ylideneoxindoles

(E)-3-Ylideneoxindoles are prepared in methanol in reasonable to good yields, as adducts of photochemical 5-exo-trig of aryl radicals, in contrast to previously reported analogous radical cyclizations initiated by tris(trimethylsilyl)silane and azo-initiators that gave reduced oxindole adduct

4-Arylbenzenesulfonamides as Human Carbonic Anhydrase Inhibitors (hCAIs): Synthesis by Pd Nanocatalyst-Mediated Suzuki–Miyaura Reaction, Enzyme Inhibition, and X-ray Crystallographic Studies

Benzenesulfonamides bearing various substituted (hetero)aryl rings in the para-position were prepared by palladium nanoparticle-catalyzed Suzuki–Miyaura cross-coupling reactions and evaluated as human carbonic anhydrase (hCA, EC 4.2.1.1) inhibitors against isoforms hCA I, II, IX, and XII. Most of the prepared sulfonamides showed low inhibition against hCA I isoform, whereas the other cytosolic isoenzyme, hCA II, was strongly affected. The major part of these new derivatives acted as potent inhibitors of the tumor-associated isoform hCA XII. An opposite trend was observed for phenyl, naphthyl, and various heteroaryl substituted benzenesulfonamides which displayed subnanomolar hCA IX inhibition while poorly inhibiting the other tumor-associated isoform hCA XII. The inhibition potency and influence of the partially restricted aryl–aryl bond rotation on the activity/selectivity were rationalized by means of X-ray crystallography of the adducts of hCA II with several 4-arylbenzenesulfonamides

Peri-operative red blood cell transfusion in neonates and infants: NEonate and Children audiT of Anaesthesia pRactice IN Europe: A prospective European multicentre observational study

BACKGROUND: Little is known about current clinical practice concerning peri-operative red blood cell transfusion in neonates and small infants. Guidelines suggest transfusions based on haemoglobin thresholds ranging from 8.5 to 12 g dl-1, distinguishing between children from birth to day 7 (week 1), from day 8 to day 14 (week 2) or from day 15 (≥week 3) onwards. OBJECTIVE: To observe peri-operative red blood cell transfusion practice according to guidelines in relation to patient outcome. DESIGN: A multicentre observational study. SETTING: The NEonate-Children sTudy of Anaesthesia pRactice IN Europe (NECTARINE) trial recruited patients up to 60 weeks' postmenstrual age undergoing anaesthesia for surgical or diagnostic procedures from 165 centres in 31 European countries between March 2016 and January 2017. PATIENTS: The data included 5609 patients undergoing 6542 procedures. Inclusion criteria was a peri-operative red blood cell transfusion. MAIN OUTCOME MEASURES: The primary endpoint was the haemoglobin level triggering a transfusion for neonates in week 1, week 2 and week 3. Secondary endpoints were transfusion volumes, 'delta haemoglobin' (preprocedure - transfusion-triggering) and 30-day and 90-day morbidity and mortality. RESULTS: Peri-operative red blood cell transfusions were recorded during 447 procedures (6.9%). The median haemoglobin levels triggering a transfusion were 9.6 [IQR 8.7 to 10.9] g dl-1 for neonates in week 1, 9.6 [7.7 to 10.4] g dl-1 in week 2 and 8.0 [7.3 to 9.0] g dl-1 in week 3. The median transfusion volume was 17.1 [11.1 to 26.4] ml kg-1 with a median delta haemoglobin of 1.8 [0.0 to 3.6] g dl-1. Thirty-day morbidity was 47.8% with an overall mortality of 11.3%. CONCLUSIONS: Results indicate lower transfusion-triggering haemoglobin thresholds in clinical practice than suggested by current guidelines. The high morbidity and mortality of this NECTARINE sub-cohort calls for investigative action and evidence-based guidelines addressing peri-operative red blood cell transfusions strategies. TRIAL REGISTRATION: ClinicalTrials.gov, identifier: NCT02350348

Nouveaux dérivés du tryptophane et du carbazole (préparation et utilisations d'intermédiaires indolo-2,3-quinodiméthanes)

REIMS-BU Santé (514542104) / SudocPARIS-BIUP (751062107) / SudocSudocFranceF

Utilisation d'indoles 2-substitués pour la préparation de nouveaux dérivés spiranniques de l'indole et de 1,2,3,4-tétrahydro(thia)carbazoles. Approche multicomposant

@Dans une première partie, dans le cadre d'une étude préliminaire sur la préparation de thia-b-carbolines, des réactions d'aza-Wittig suivies d'une électrocyclisation, ont été réalisées à partir de l'iminophosphorane de la tryptamine, pour obtenir des tétrahydro-b-carbolines fonctionnalisées. Ces réactions donnent, dans certains cas, des composés originaux qui peuvent se révéler actifs sur le plan biologique. Dans une deuxième partie, une méthode permettant d'accéder à des dérivés contraints spiranniques de tryptophanes b-substitués, a été développée. Cette synthèse de spiro[pyrrolidinon-3,3'-indoles], basée sur une condensation trimoléculaire suivie d'une réaction domino, a été appliquée à des indoles substitués en position 2 ainsi qu'à l'oxindole. Cette approche multicomposant a été étendue à la préparation "one pot" de tétrahydrocarbazoles polyfonctionnalisés, à partir d'indoles substitués en position 2, via une réaction pseudo-tétramoléculaire. Les tétrahydrocarbazoles synthétisés ont été modifiés par des réactions de cyclisation intramoléculaire pour aboutir à de nouveaux hétérocycles.REIMS-BU Santé (514542104) / SudocPARIS-BIUP (751062107) / SudocSudocFranceF

Etude analytique et toxicologique des substances volatiles présentes dans une colle utilisée par les pongistes

REIMS-BU Santé (514542104) / SudocSudocFranceF

Indolisation d'hétérocycles aromatiques par réactions

REIMS-BU Santé (514542104) / SudocSudocFranceF

Le couplage de Suzuki dans la synthèse d'hétérocycles azotés d'intérêt thérapeutique

REIMS-BU Santé (514542104) / SudocSudocFranceF