Results 31 to 40 of about 12,432 (295)

Microbial Transformation of neo-Clerodane Diterpenoid, Scutebarbatine F, by Streptomyces sp. CPCC 205437

Frontiers in Microbiology, 2021
Biotransformation of the neo-clerodane diterpene, scutebarbatine F (1), by Streptomyces sp. CPCC 205437 was investigated for the first time, which led to the isolation of nine new metabolites, scutebarbatine F1–F9 (2–10). Their structures were determined
Dewu Zhang, Xiaoyu Tao, Guowei Gu, Yujia Wang, Wenxia Zhao, Wuli Zhao, Yan Ren, Shengjun Dai, Liyan Yu   +8 more
doaj   +1 more source

Preparation of 4 '-spirocyclobutyl nucleoside analogues as novel and versatile adenosine scaffolds

, 2019
Despite the large variety of modified nucleosides that have been reported, the preparation of constrained 4 '-spirocyclic adenosine analogues has received very little attention.
De Vleeschouwer, Freija, Kong, Hanchu, Meerpoel, Lieven, Pande, Vineet, Sun, Weimei, Thuring, Jan Willem, Van Hecke, Kristof, Verhoeven, Jonas, Verniest, Guido, Vos, Ann, Wu, Tongfei   +10 more
core   +1 more source

Stereoselective synthesis of functionalized pyrrolidines by the diverted NH insertion reaction of metallocarbenes with β-aminoketone derivatives [PDF]

, 2016
A highly stereoselective route to functionalized pyrrolidines from the metal catalyzed diverted N-H insertion of a range of diazocarbonyl compounds with β-aminoketone derivatives is described. A number of catalysts (rhodium(II) carboxylate dimers, copper(
Aviv, Aviv, Baumann, Bhat, Burtoloso, Davis, Davis, Deng, Espino, Feling, Feula, Ford, Gillingham, Han, Han, Hayes, Hesp, Ikota, Jiang, Jiang, Jing, Jing, Jing, Kronenthal, Liu, Liu, Marcotullio, Medvedev, Michael, Moloney, Nicolle, Pandey, Rao, Reddy, Rodríguez, Taber, Terada, Verkade, Yamazaki   +38 more
core   +2 more sources

Stereoselective Domino Reactions in the Synthesis of Spiro Compounds

Synthesis, 2022
AbstractThis review summarizes the latest developments in asymmetric domino reactions, with the emphasis on the preparation of spiro compounds. Discussions on the stereoselectivity of the transformations, the reaction mechanisms, the rationalization of the stereochemical outcome, and the applications of domino reactions to the synthesis of biologically
Regina Westphal, Eclair Venturini Filho, Fabrizio Medici, Maurizio Benaglia, Sandro Greco   +4 more
openaire   +1 more source

Synthesis of spiro quasi[1]catenanes and quasi[1]rotaxanes via a templated backfolding strategy

Nature Communications, 2017
Spiro compounds contain two or more rings linked together through one common atom. Here the authors provide a method to backfold both rings, producing spiro quasi[1]catenanes, via a strategy of temporarily linking the linear intermediates with covalent ...
Luuk Steemers, Martin J. Wanner, Martin Lutz, Henk Hiemstra, Jan H. van Maarseveen   +4 more
doaj   +1 more source

(±)-Peniorthoesters A and B, Two Pairs of Novel Spiro-Orthoester en-antiomers With an Unusual 1,4,6-Trioxaspi-ro[4.5]decane-7-One Unit From Penicillium minioluteum

Frontiers in Chemistry, 2018
(±)-Peniorthoesters A and B (±1 and ±2), two pairs of unprecedented spiro-orthoester enantiomers with a 1,4,6-trioxaspiro[4. 5]decane-7-one unit, were obtained from Penicillium minioluteum. Their structures were determined by spectroscopic methods, X-ray
Xiaorui Liu, Chunmei Chen, Yinyu Zheng, Mi Zhang, Qingyi Tong, Junjun Liu, Qun Zhou, Jianping Wang, Zengwei Luo, Hucheng Zhu, Yonghui Zhang   +10 more
doaj   +1 more source

Spiro Cyclohexadienones from the Reaction of Phenolic Enaminone Derivatives with Hypervalent Iodine Reagents

Molecules, 2000
Phenolic enamino compounds, prepared from 2-(4-hydroxyphenyl)-ethylamine and the corresponding β-keto carbonyl compounds, afford spiro cyclohexadienone derivatives on reaction with hypervalent iodine reagents.
Anastasios Varvoglis, Spyros Spyroudis, Ioannis Papoutsis, Anna Asmanidou   +3 more
doaj   +1 more source

Facile, Regio- and Diastereoselective Synthesis of Spiro-Pyrrolidine and Pyrrolizine Derivatives and Evaluation of Their Antiproliferative Activities

Molecules, 2014
A number of novel spiro-pyrrolidines/pyrrolizines derivatives were synthesized through [3+2]-cycloaddition of azomethine ylides with 3,5-bis[(E)-arylmethylidene]tetrahydro-4(1H)-pyridinones 2a–n.
Abdulrahman I. Almansour, Raju Suresh Kumar, Farzana Beevi, Amir Nasrolahi Shirazi, Hasnah Osman, Rusli Ismail, Tan Soo Choon, Brian Sullivan, Kellen McCaffrey, Alaa Nahhas, Keykavous Parang, Mohamed Ashraf Ali   +11 more
doaj   +1 more source

Recent advances in solid-state organic lasers

, 2011
Organic solid-state lasers are reviewed, with a special emphasis on works published during the last decade. Referring originally to dyes in solid-state polymeric matrices, organic lasers also include the rich family of organic semiconductors, paced by ...
Ahmad, Amarasinghe, Anderson, Andrew, Anker, Baktur, Baldo, Baldo, Bao, Barnes, Baumann, Baumann, Beaufils, Berggren, Berggren, Bergman, Bernanose, Bisri, Bulovic, Butov, Capelli, Casalboni, Chandra, Chang, Chen, Christopoulos, Clark, Coles, Costela, Coulson, Dal Negro, Davis, De Leon, De Leon, Del Carro, Deng, Deshpande, Ding, Dou, Duarte, Faloss, Forget, Forget, Fox, Frolov, Frolov, Frolov, Garcia-Moreno, Gartner, Gather, Gather, Gaylord, Giebink, Goossens, Gorrn, Guilhabert, Gwinner, Görrn, Hecht, Heeger, Heliotis, Heliotis, Heliotis, Hide, Holzer, Holzer, Imamoglu, Ishow, Johansson, Jordan, Karnutsch, Kena-Cohen, Klaers, Klinkhammer, Kogelnik, Koschorreck, Kozlov, Kozlov, Kozlov, Kozlov, Kraabel, Kranzelbinder, Kuznetsov, Lattante, Lebental, Lebental, Leclerc, Lehnhardt, Lehnhardt, Lidzey, List, List, Liu, Maiman, Malliaras, Matsushima, Mayer, McGehee, McGehee, McGehee, Meech, Meerheim, Mo, Moliton, Moses, Muccini, Muñoz, Nakanotani, Nakanotani, Namdas, Noginov, Noginov, Osterbacka, Oulton, Persano, Peterson, Pisignano, Pisignano, Pisignano, Pope, Popov, Rabbani-Haghighi, Rabbani-Haghighi, Rabbani-Haghighi, Rabbani-Haghighi, Rabe, Rabe, Raether, Rahn, Ramos-Ortiz, Reufer, Ribierre, Richardson, Riechel, Riechel, Riedl, Rose, Sakata, Samuel, Samuel, Samuel, Schafer, Schafer, Schawlow, Scherf, Schneider, Schneider, Schneider, Schneider, Schneider, Schols, Schols, Schulzgen, Schön, Schütte, Siegman, Siegman, Soffer, Spehr, Stockman, Stockman, Stroisch, Sun, Takenobu, Tanase, Tang, Tang, Tang, Tessler, Tessler, Tessler, Tessler, Tian, Tsiminis, Tsiminis, Tsutsumi, Turnbull, Valeur, Vannahme, Vasdekis, Vasdekis, Virgili, Wallikewitz, Wegmann, Wenger, Xia, Yamamoto, Yang, Yang, Yang, Yap, Yariv, Yariv, Yokoyama, Yoshioka, Yuyama   +195 more
core   +3 more sources

Experimental and theoretical insights into the sequential oxidations of 3π-2spiro molecules derived from oligophenylenes: A comparative study of 1,2-b-DiSpiroFluorene-IndenoFluorene versus 1,2-b-DiSpiroFluorene(tert-butyl)4-IndenoFluorene [PDF]

, 2013
International audienceCyclic voltammetry and differential pulse voltammetry have shown too distinct behaviours in the sequential oxidation processes of two closely related compounds, namely 1,2-b-DiSpiroFluorene-IndenoFluorene (1,2-b-DSF-IF) and 1,2-b ...
Barrière, Frédéric, Poriel, Cyril, Rault-Berthelot, Joëlle   +2 more
core   +2 more sources