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Beilstein J. Org. Chem. 2020, 16, 2679–2686, doi:10.3762/bjoc.16.218
Graphical Abstract
Scheme 1: The two types of azomethine imines (AMI).
Scheme 2: Reaction of 1,5-diazabicyclo[3.1.0]hexanes 1a–d with diarylpropenones 2a–l.
Figure 1: Single-crystal X-ray structure of compound 3e.
Figure 2: Single-crystal X-ray structure of compound 3g.
Scheme 3: Control experiments.
Scheme 4: Mechanistic hypothesis for cycloaddition and cycloreversion reactions of diazabicyclohexane 1a with...
Scheme 5: Experiments on the trapping of azomethine imine, generated from pyrazolopyrazole 3g.
Beilstein J. Org. Chem. 2016, 12, 2563–2569, doi:10.3762/bjoc.12.251
Scheme 1: The regioselectivities of the reaction between monosubstituted thioureas and maleimides according t...
Scheme 2: Reaction of N-phenylthiourea (1a) with maleimides 2a,b (conceivable products are given in parenthes...
Figure 1: OLEX2 representation of the crystal structure of thiazolidine 3b. Thermal ellipsoids are given at t...
Figure 2: Fragments of the 1H NMR spectra of thiazolidine 3g at −20 °C (1), 23 °C (2) and 120 °C (3). Spectru...