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Search for "diamine ligands" in Full Text gives 9 result(s) in Beilstein Journal of Organic Chemistry.
Copper-catalyzed N-arylation of amines with aryliodonium ylides in water
Beilstein J. Org. Chem. 2023, 19, 1008–1014, doi:10.3762/bjoc.19.76
- strategies for C–N bond formation have been extensively explored by various research groups for the N-arylation of amines. Specifically, seminal contributions by Buchwald [15] and Hartwig [16] involving the use of palladium complexes as catalysts in the presence of either phosphine or diamine ligands for C–N
Recent advances in Cu-catalyzed C(sp3)–Si and C(sp3)–B bond formation
Beilstein J. Org. Chem. 2020, 16, 691–737, doi:10.3762/bjoc.16.67
Synthesis of non-racemic 4-nitro-2-sulfonylbutan-1-ones via Ni(II)-catalyzed asymmetric Michael reaction of β-ketosulfones
Beilstein J. Org. Chem. 2019, 15, 1289–1297, doi:10.3762/bjoc.15.127
- catalytic Michael reaction itself was carried out with high diastereoselectivity, but the Michael adducts may epimerize at the C-2 position at a significant rate. Conditions for the preparation of individual diastereomers were found. Keywords: asymmetric catalysis; chiral diamine ligands; ketosulfones
Photocatalyic Appel reaction enabled by copper-based complexes in continuous flow
Beilstein J. Org. Chem. 2018, 14, 2730–2736, doi:10.3762/bjoc.14.251
- complexes were poor catalysts, while when considering the diamine ligands the dq and bathophenthroline catalysts provided poor to modest yields. Also, BINAP and Xantphos-based catalysts tended to afford higher yields of 2, while amongst the diamines, the triazole-based complexes were almost all efficient at
Progress in copper-catalyzed trifluoromethylation
Beilstein J. Org. Chem. 2018, 14, 155–181, doi:10.3762/bjoc.14.11
- diamine ligands such as 1,10-phenanthroline (phen) were discovered. These diamines were able to accelerate the second step to regenerate sufficient amounts of reusable complexes A utilizing copper(I)-diamine complexes (Scheme 1), thus accelerating the trifluoromethylation of aryl/heteroaryl iodides
Reagent-controlled regiodivergent intermolecular cyclization of 2-aminobenzothiazoles with β-ketoesters and β-ketoamides
Beilstein J. Org. Chem. 2017, 13, 2739–2750, doi:10.3762/bjoc.13.270
- silylation [72]. In these reactions, the single electron transfer (SET) is initiated by KOt-Bu/DMF [63][67][69][71] or KOt-Bu in combination with additives such as bidentate diamine ligands [61][62][63][64][65], 18-crown-6 [70] or azobisisobutyronitrile (AIBN) [62][66]. Herein, we report the synthesis of
Cu-catalyzed trifluoromethylation of aryl iodides with trifluoromethylzinc reagent prepared in situ from trifluoromethyl iodide
Beilstein J. Org. Chem. 2013, 9, 2404–2409, doi:10.3762/bjoc.9.277
- % loading of both CuI and phen ligand, the yield of 2a was further increased to a higher level (95% yield) along with an increased selectivity with only 2% yield of 3a (Table 1, entry 14). The ligand effect was further investigated in DMPU at 50 °C and phen was preferable to other diamine ligands (Table 2
A scalable synthesis of the (S)-4-(tert-butyl)-2-(pyridin-2-yl)-4,5-dihydrooxazole ((S)-t-BuPyOx) ligand
Beilstein J. Org. Chem. 2013, 9, 1637–1642, doi:10.3762/bjoc.9.187
- multi-gram scale synthesis and provides the target ligand in 64% overall yield. Keywords: asymmetric catalysis; diamine ligands; optimization; synthesis; Introduction Pyridinooxazoline (PyOx) ligands represent a growing class of bidentate dinitrogen ligands used in asymmetric catalysis [1][2][3][4][5
Inter- and intramolecular enantioselective carbolithiation reactions
Beilstein J. Org. Chem. 2013, 9, 313–322, doi:10.3762/bjoc.9.36
- ) and (1S,2S)-1,2-dimethoxy-1,2-diphenylethane (L10) are particularly effective surrogates for sparteine, affording 3-methylindoline (R)-38a in good yield and high enantiomeric excess (Scheme 14). With regard to chiral diamine ligands, enantiomeric excess is only maintained by using cis-1,5-diazadecalin
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