6039-59-4Relevant articles and documents
Mass Spectral Evidence for Δ1-Pyrazolines from the 1,3-Dipolar Addition of Diazomethane to 1-Hydroxy-2-Naphthoic Acid and Its Methyl Ester
Mikita, Michael A.,Arterburn, Jeffery B.,Craig, Larry
, p. 1043 - 1044 (1989)
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Synthesis of 3,3′-(4H,4′H)-spirobi(2H-naphtho[1,2-b]pyran)-6, 6′-dicarboxylic acid and its optical resolution
Tojo, Kenta,Arisawa, Tatsuya,Yasutake, Mikio,Aoki, Yoshio,Teninuma, Daiyo
, p. 930 - 931 (2008)
The synthesis and optical resolution of 3,3′-(4H,4′H)- spirobi(2H-naphtho[1,2-b]pyran)-6,6′-dicarboxylic acid were successfully accomplished. The formation of the spiro skeleton and the bromination of the aromatic ring were easily achieved in the presence of bromine. Optical resolution was achieved by amidation with L-valinol (2-amino-3-methyl-1-butanol) . Copyright
Axially Chiral 1,1'-Binaphthyl-2-Carboxylic Acid (BINA-Cox) as Ligands for Titanium-Catalyzed Asymmetric Hydroalkoxylation
Blazejak, Max,Helmbrecht, Sebastian L.,Hintermann, Lukas,Schlüter, Johannes
supporting information, (2020/04/15)
Axially chiral, enantiopure 1,1'-binaphthyl-2-carboxylic acids (BINA-Cox) have recently been introduced as chiral ligands for transition metal catalysis. Together with equimolar, co-catalytic amounts of Ti(OiPr)4 and water they form an in situ catalyst that performs the asymmetric catalytic hydroalkoxylation of 2-allylphenols to 2-methylcoumarans at high temperature (240 °C, microwave heating). The synthesis of reference ligand 2'-MeO-BINA-Cox (L1) has been optimized and performed at molar scale. Synthetic routes have been developed to access a variety of substituted BINA-Cox ligands (>30 examples), which have been tested for ligand effects on the reference asymmetric cyclization of 2-allylphenol. The substrate range of asymmetric catalytic hydroalkoxylation has been explored through systematic substrate structure variations to define scope and limitations of the titanium-catalyzed process. The new substrates 2-(1-vinylcycloalkyl)phenols (1j, 1k), 2-(2-vinylphenyl)propan-2-ol (1t), and 2'-vinyl-[1,1'-biphenyl]-2-ol (1u) are shown to undergo asymmetric catalytic cyclization to benzodihydrofurans and benzo[c]chromene, respectively.
Organometallic complex with benzazole derivatives as a ligand and organic electroluminescent device including the same
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Paragraph 0182-0184, (2019/06/04)
Provided is an organometallic complex with benzazole derivatives represented by chemical formula 1 as a ligand. A novel organometallic complex according to the present invention can be used as an organic layer material of an organic electroluminescent dev