1516-96-7Relevant academic research and scientific papers
Tetra-Aza-Pentacenes by means of a One-Pot Friedl?nder Synthesis
Ukwitegetse, Narcisse,Saris, Patrick J. G.,Sommer, Jonathan R.,Haiges, Ralf M.,Djurovich, Peter I.,Thompson, Mark E.
, p. 1472 - 1475 (2019)
Tetra-aza-pentacenes are attractive n-type small molecules for optoelectronic device applications, yet their syntheses are often laborious. Disclosed here is a one-pot Friedl?nder synthesis of 1,7,8,14-tetraazapentacece (tAP) derivatives (linear and/or be
An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond
Kobayashi, Ryo,Ishida, Shintaro,Iwamoto, Takeaki
, p. 9425 - 9428 (2019)
Despite tremendous efforts to synthesize isolable compounds with an Si=O bond, silicon analogues of ketones that contain an unperturbed Si=O bond have remained elusive for more than 100 years. Herein, we report the synthesis of an isolable silicon analogu
Gold(I)-Catalyzed 7-exo-dig Cyclization: A Key Step to Access the Bicyclo[4.2.1]nonane Skeleton of Vibsatin A, a Neurotrophic Diterpenoid
Allievi, Luca,Dhambri, Sabrina,Sun, Rongyu,Selkti, Mohamed,Lannou, Marie-Isabelle,Sorin, Geoffroy,Ardisson, Janick
, p. 5218 - 5222 (2021)
Vibsatin A is a new neurotrophic vibsane-Type diterpenoid comprising a bridged bicyclo[4.2.1]nonane skeleton. Inspired by Sawamura's works, we generated the bicyclic backbone through a Conia-ene-derived 7-exo-dig cyclization from an enantiomerically enriched TIPS-based silyl enol ether. The reaction, catalyzed by a sensitive gold(I) complex, was efficiently performed on a large scale by glovebox free techniques. Furthermore, the shape of this system was exploited for subsequent installation of all of the stereogenic centers.
Highly Stereoselective Synthesis of 1,2-Disubstituted Indanes by Pd-Catalyzed Heck/Suzuki Sequence of Diarylmethyl Carbonates
Matsude, Akihiro,Hirano, Koji,Miura, Masahiro
, p. 3190 - 3194 (2020)
A palladium-catalyzed Mizoroki-Heck-type cyclization/Suzuki-Miyaura cross-coupling cascade of diarylmethyl carbonates with arylboronic acid derivatives has been developed to deliver the corresponding 1,2-disubstituted indanes in good yields with high dias
Boraformylation and Silaformylation of Allenes
Fujihara, Tetsuaki,Sawada, Ayumi,Yamaguchi, Tatsuya,Tani, Yosuke,Terao, Jun,Tsuji, Yasushi
, p. 1539 - 1543 (2017)
The boraformylation of allenes with B2(pin)2and a formate ester as boron and formyl source, respectively, proceeds in the presence of a copper catalyst. The reaction selectively affords the corresponding β-boryl β,γ-unsaturated aldeh
Preparation method of 2, 6-di-tert-butyl-4-bromoanisole
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Paragraph 0073-0081, (2021/11/06)
The invention provides a preparation method of 2, 6-di-tert-butyl-4-bromoanisole, which comprises the following steps of: adding a tert-butylation reagent into 4-bromoanisole under the catalysis of acid, and reacting to obtain 2, 6-di-tert-butyl-4-bromoanisole. According to the preparation method disclosed by the invention, 4-bromoanisole which is cheap and easy to obtain is taken as a raw material, a solvent is not required to be used, the 2, 6-di-tert-butyl-4-bromoanisole can be obtained only in one step, the preparation method has the advantages of high production efficiency and low production cost, and the raw materials and auxiliary reagents used in the reaction process are relatively low in toxicity and are more environment-friendly.
Phospholane-Phosphite Ligands for Rh Catalyzed Enantioselective Conjugate Addition: Unusually Reactive Catalysts for Challenging Couplings
Clarke, Matthew L.,Cordes, David B.,Fuentes, José A.,Gilbert, Sophie H.,Slawin, Alexandra M. Z.
supporting information, (2020/05/25)
The use of Rh catalysts derived from a phospholane-phosphite ligand were found to be more productive than the classic rhodium/BINAP system in enantioselective conjugate additions. These catalysts enable the use of lower amounts of aryl boronic acid in an
COMPOSITIONS AND METHODS FOR IMMUNE MODULATION AND TREATMENT OF CANCER
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Paragraph 0191, (2020/07/31)
The disclosure relates to rexinoids, including compounds of the Formula (I) and (II) or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof. These rexinoids are useful for increasing PD-L1 in vivo, for treatment of cancer, and for inhibiting the onset of cancer.
Formation and Activation of Zr/Hf Bis(phenolate-ether) Precatalysts
Cuthbert, Eric N. T.,Busico, Vincenzo,Herbert, David E.,Budzelaar, Peter H. M.
supporting information, p. 3396 - 3410 (2019/08/12)
Zr and Hf complexes of bis(phenolate-ether) (“O4”) ligands feature high activity, stereoselectivity and molecular weight capability for propene polymerization at high temperature. Here we report a simplified ligand synthesis and several new examples of O4
Chiral 1,3-diaryl imidazolium salt carbene precursor, synthesis method thereof, metal salt compound and application
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Paragraph 0375-0379, (2019/06/07)
The invention discloses a chiral 1,3-diaryl imidazolium salt carbene precursor, a synthesis method thereof, a metal salt compound and application. The chiral 1,3-diaryl imidazolium salt carbene precursor forms a complex together with the copper to catalyz
