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Beilstein J. Org. Chem. 2011, 7, 1048–1054, doi:10.3762/bjoc.7.120
Graphical Abstract
Figure 1: Sequential gas/liquid–liquid/liquid flow reactor for the synthesis of 4-fluoropyrazole derivatives.
Figure 2: H-bonded cycles in structures 4a (a) and 4f (b) (only one disordered pyrazole hydrogen atom is show...
Beilstein J. Org. Chem. 2010, 6, No. 45, doi:10.3762/bjoc.6.45
Scheme 1: Synthesis of novel tricyclic heterocycles from pentafluoropyridine.
Scheme 2: Synthetic route to dioxa-diaza-anthracene derivatives.
Scheme 3: Reactions of tetrafluoropyridazine 3 with sodium phenoxide.
Scheme 4: Synthesis of dioxa-1,2-diaza-anthracene scaffold 5.
Scheme 5: Mechanism of formation of 5.
Scheme 6: Reactions of dioxa-1,2-diaza-anthracene scaffold 5 with nucleophiles.
Figure 1: Molecular structure of 4-allylamino-3-fluoro-9,10-dioxa-1,2-diaza-anthracene (9b).
Beilstein J. Org. Chem. 2006, 2, No. 9, doi:10.1186/1860-5397-2-9
Scheme 1: The furan-nitroacylate approach to poly hydroxylated ACHC derivatives
Scheme 2: Reagents: i. Furan (see box); ii. Zn, HCl., EtOH then Boc2O, Et3N, 2b 89%, 3b 77%; iii. KHMDS, THF,...
Figure 1: Selected NOESY Correlations for 6–9
Scheme 3: Reagents: i. mCPBA, CH2Cl2 11 : 12 (9 : 1) 77%, 15 82%; ii. Ac2O, Py then mCPBA, CH2Cl2 (13 only) 6...
Figure 2: Selected NOESY Correlations for 14–16 (R = Boc)
Scheme 4: Reagents: i. OsO4, Me3NO.H2O, acetone 18 78% from 4 ii. TBSCl, imidazole, CH2Cl2, 17 66% from 2b; i...
Figure 3: Selected NOESY correlations for 24 – 26
Scheme 5: Reagents: i. HClO4, H2O/acetone; v. Ac2O, pyridine; iii. H2, Pd/C, 24 71%, 25 67%, 26 71%