Blar i NTNU Open på forfatter "Jonsson, Helgi Freyr"
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In situ detection of an unstable C,N-Au(III) chelate by 15N NMR methods
Lund, Jostein Johannes; Jonsson, Helgi Freyr; Fiksdahl, Anne (Peer reviewed; Journal article, 2022)Au(III)-NHC-oxazolyl complexes are prepared by oxidation and anion exchange of the corresponding Au(I)Cl-NHC-oxazolyl precursors, which are synthesized from appropriate imidazolium pre-ligands. As the Au(III) complexes are ... -
Multiomics analysis of rheumatoid arthritis yields sequence variants that have large effects on risk of the seropositive subset
Saevarsdottir, Saedis; Stefansdottir, Lilja; Sulem, Patrick; Thorleifsson, Gudmar; Ferkingstad, Egil; Rutsdottir, Gudrun; Glintborg, Bente; Westerlind, Helga; Grondal, Gerdur; Loft, Isabella C; Sorensen, Signe Bek; Lie, Benedicte Alexandra; Brink, Mikael; Arlestig, Lisbeth; Arnthorsson, Asgeir Orn; Baecklund, Eva; Banasik, Karina; Bank, Steffen; Bjorkman, Lena I; Ellingsen, Torkell; Erikstrup, Christian; Frei, Oleksandr; Gjertsson, Inger; Gudbjartsson, Daniel F; Gudjonsson, Sigurjon A; Halldorsson, Gisli H; Hendricks, Oliver; Hillert, Jan; Hogdall, Estrid; Jacobsen, Søren; Jensen, Dorte Vendelbo; Jonsson, Helgi Freyr; Kastbom, Alf; Kockum, Ingrid; Kristensen, Salome; Kristjansdottir, Helga; Larsen, Margit H; Linauskas, Asta; Hauge, Ellen-Margrethe; Loft, Anne G; Ludviksson, Bjorn R; Lund, Sigrun H; Markusson, Thorsteinn; Masson, Gisli; Melsted, Pall; Moore, Kristjan H S; Munk, Heidi; Nielsen, Kaspar R; Norddahl, Gudmundur L; Oddsson, Asmundur; Olafsdottir, Thorunn A; Olason, Pall I; Olsson, Tomas; Ostrowski, Sisse Rye; Hørslev-Petersen, Kim; Rognvaldsson, Solvi; Sanner, Helga; Silberberg, Gilad N; Stefansson, Hreinn; Sørensen, Erik; Sørensen, Inge J; Turesson, Carl; Bergman, Thomas; Alfredsson, Lars; Kvien, Tore Kristian; Brunak, Søren; Steinsson, Kristján; Andersen, Vibeke; Andreassen, Ole; Rantapää-Dahlqvist, Solbritt; Hetland, Merete Lund; Klareskog, Lars; Askling, Johan; Padyukov, Leonid; Pedersen, Ole Bv; Thorsteinsdottir, Unnur; Jonsdottir, Ingileif; Stefansson, Kari (Peer reviewed; Journal article, 2022)Objectives To find causal genes for rheumatoid arthritis (RA) and its seropositive (RF and/or ACPA positive) and seronegative subsets. Methods We performed a genome-wide association study (GWAS) of 31 313 RA cases (68% ... -
Preparation of benzannulated spiroketals by gold(III) catalyzed spirocyclization of alkynyl diols
Jonsson, Helgi Freyr; Fiksdahl, Anne (Peer reviewed; Journal article, 2021)The first gold(III)-oxazoline catalysed intramolecular tandem dihydroalkoxylations of alkynyl diols to give benzannulated 5,6-spiroketal products is reported. The results showed that Au(III)-bisoxazoline (BOX) and ... -
Studies on gold-nitrone systems
Jonsson, Helgi Freyr; Fiksdahl, Anne (Journal article; Peer reviewed, 2019)Novel Au(I)-nitrone complexes with specific catalytic properties were prepd. Also, Au(I)- and Au(III)-oxadiazole complexes were formed by a novel Au-generated nitrile-nitrone [3 + 2] cycloaddn., and the crystal ... -
Tunable Gold-catalyzed Reactions of Propargyl Alcohols and Aryl Nucleophiles
Jonsson, Helgi Freyr; Solvi, Thomas Nordbø; Lomeland, Sondre; Holta, Ann Christin Reiersølmoen; Fiksdahl, Anne (Peer reviewed; Journal article, 2022)Gold-catalyzed transformations of 1,3-diarylpropargyl alcohols and various aryl nucleophiles were studied. Selective tunable synthetic methods were developed for 1,1,3-triarylallenes, diaryl-indenes and tetraaryl-allyl ... -
Using multivariable Mendelian randomization to estimate the causal effect of bone mineral density on osteoarthritis risk, independently of body mass index
Hartley, April; Sanderson, Eleanor; Granell, Raquel; Paternoster, Lavinia; Zheng, Jie; Smith, George Davey; Southam, Lorraine; Hatzikotoulas, Konstantinos; Boer, Cindy G.; Van Meurs, Joyce; Zeggini, Eleftheria; Gregson, Celia L.; Tobias, Jon H.; Stefánsdóttir, Lilja; Zhang, Yanfei; De Almeida, Rodrigo Coutinho; Wu, Tian T.; Teder-Laving, Maris; Skogholt, Anne Heidi; Terao, Chikashi; Zengini, Eleni; Alexiadis, George; Barysenka, Andrei; Bjornsdottir, Gyda; Gabrielsen, Maiken Elvestad; Gilly, Arthur; Ingvarsson, Thorvaldur; Johnsen, Marianne Bakke; Jonsson, Helgi Freyr; Kloppenburg, Margreet G.; Luetge, Almut; Mägi, Reedik; Mangino, Massimo; Nelissen, Rob R.G.H.H.; Shivakumar, Manu; Steinberg, Julia; Takuwa, Hiroshi; Thomas, Laurent; Tuerlings, Margo; Babis, George; Cheung, Jason Pui Yin; Samartzis, Dino; Lietman, Steve A.; Slagboom, P. Eline; Stefansson, Kari; Uitterlinden, André G.; Winsvold, Bendik K S; Zwart, John Anker Henrik; Sham, Pak Chung; Thorleifsson, Gudmar; Gaunt, Tom R.; Morris, Andrew P.; Valdes, Ana M.; Tsezou, Aspasia; Cheah, Kathryn S.E.; Ikegawa, Shiro; Hveem, Kristian; Esko, Tõnu; Wilkinson, J. Mark; Meulenbelt, Ingrid; Michael Lee, Ming Ta; Styrkársdóttir, Unnur (Peer reviewed; Journal article, 2022)Objectives Observational analyses suggest that high bone mineral density (BMD) is a risk factor for osteoarthritis (OA); it is unclear whether this represents a causal effect or shared aetiology and whether these ...