This search combines search strings from the content search (i.e. "Full Text", "Author", "Title", "Abstract", or "Keywords") with "Article Type" and "Publication Date Range" using the AND operator.
Beilstein J. Org. Chem. 2021, 17, 1509–1517, doi:10.3762/bjoc.17.108
Graphical Abstract
Figure 1: Structures of exemplary benzo- and heteroaromatic fused 1,4-quinone drugs and natural products.
Scheme 1: First [3 + 2]-cycloaddition of 1,4-naphthoquinone (1a) with intermediate nitrile imine 2, generated...
Scheme 2: Selected applications of trifluoroacetonitrile imines 7 in the synthesis of S-containing 5- and 6-m...
Scheme 3: Synthesis of [3 + 2]-cycloadducts 9a–l derived from CF3-substituted nitrile imines 7a–h and 1,4-qui...
Figure 2: X-ray structure of 3-trifluoromethylpyrazole derivative 9d. The labeling scheme of the asymmetric u...
Scheme 4: Thermal elimination of MeOH from the initial [3 + 2]-cycloadduct of 1d and nitrile imine 7d generat...
Scheme 5: Formation of the thermally stable, initially formed [3 + 2]-cycloadduct 10c obtained from 1e and ni...
Figure 3: Electronic absorption spectra for selected a) naphthoquinone-derived (9c, 9d, 9g) and b) anthraquin...
Beilstein J. Org. Chem. 2019, 15, 497–505, doi:10.3762/bjoc.15.43
Scheme 1: Synthesis of 2-unsubstituted imidazole N-oxides 1 from α-hydroxyiminoketones 2 and formaldimines 3.
Scheme 2: Preparation of adamantyloxyamine (4) and its conversion into N-(adamantyloxy)formaldimine (6a); Ad ...
Scheme 3: Synthesis of 1-(adamantyloxy)imidazole 3-oxides 7a–e and 1-adamantylimidazole 3-oxides 7f,g in acet...
Scheme 4: Deoxygenation of 1-(adamantyloxy)imidazole 3-oxides 7a–d and isomerization of 7b into imidazole-2-o...
Scheme 5: Conversions of imidazole 3-oxides 7a–d into 1-(adamantyloxy)imidazole-2-thiones 10a–d via sulfur tr...
Scheme 6: Syntheses of the non-symmetric 1,3-dialkoxyimidazolium bromides 13a–c and 1-alkyl-3-alkoxyimidazoli...
Scheme 7: Attempted O-adamantylation of imidazole N-oxide 7a with adamantan-1-yl trifluoroacetate and subsequ...
Scheme 8: Synthesis of the symmetric 1,3-di(adamantyloxy)imidazolium bromide (15) and its transformation to 1...
Beilstein J. Org. Chem. 2012, 8, 662–674, doi:10.3762/bjoc.8.74
Scheme 1: Reactivity of N-glycosyl nitrones 1 towards dipolarophiles and nucleophiles leading to products of ...
Scheme 2: Additions of lithiated alkoxyallenes to L-erythrose-derived nitrone 1a leading to 3,6-dihydro-2H-1,...
Figure 1: By-products 4 and 5 isolated from the reaction of nitrone 1a with lithiated methoxyallene.
Figure 2: Single-crystal X-ray analysis of (3R)-3a (ellipsoids are drawn at a 50% probability level).
Figure 3: Model proposed for the addition of lithiated allenes to nitrone 1a.
Scheme 3: Speculative mechanistic suggestion for the formation of tetrasubstituted pyrrole derivative 5.
Scheme 4: Introduction of a 5-hydroxy group into 1,2-oxazine derivatives 3 by a hydroboration/oxidation proto...
Scheme 5: Samarium diiodide-induced ring opening of tetrahydro-2H-1,2-oxazine derivatives 12 and 13.
Scheme 6: Reaction of tetrahydro-2H-1,2-oxazine 18 with samarium diiodide. (a) NaH (1.4 equiv), BnBr (1.2 equ...
Scheme 7: Attempted synthesis of pyrrolidine derivatives from precursor 13. (a) TMSCl (1.5 equiv), imidazole,...
Scheme 8: Synthesis of TBS-protected tetrahydro-2H-1,2-oxazine 27 and its transformation into pyrrolidine der...