Harnessing unprotected deactivated amines and arylglyoxals in the Ugi reaction for the synthesis of fused complex nitrogen heterocycles

• Javier Gómez-Ayuso,
• Pablo Pertejo,
• Tomás Hermosilla,
• Israel Carreira-Barral,
• Roberto Quesada and
• María García-Valverde

Beilstein J. Org. Chem. 2024, 20, 1758–1766, doi:10.3762/bjoc.20.154

• (right). The thermal ellipsoid plot (Olex2) is at the 40% probability level. X-ray diffraction structure of dipyrrolopiperazinone 12c. The thermal ellipsoid plot (Olex2) is at the 40 % probability level. Synthesis of benzodiazepinones 5 from anthranilic acid derivatives. Diastereoselective one-pot

Bi- and trinuclear copper(I) complexes of 1,2,3-triazole-tethered NHC ligands: synthesis, structure, and catalytic properties

• Shaojin Gu,
• Jiehao Du,
• Jingjing Huang,
• Huan Xia,
• Ling Yang,
• Weilin Xu and
• Chunxin Lu

Beilstein J. Org. Chem. 2016, 12, 863–873, doi:10.3762/bjoc.12.85

• SQUEEZE [48]. Further details of the structural analysis are summarized in Table 3. X-ray diffraction structure of copper(II) complex 2 with thermal ellipsoids drawn at 30% probability. The anion and hydrogen atoms are omitted for clarity. Selected bond distances (Å) and angles (°): Cu1-O1 1.931(4), Cu1

Investigation of the role of stereoelectronic effects in the conformation of piperidones by NMR spectroscopy and X-ray diffraction

• Cesar Garcias-Morales,
• David Ortegón-Reyna and
• Armando Ariza-Castolo

Beilstein J. Org. Chem. 2015, 11, 1973–1984, doi:10.3762/bjoc.11.213

• –H(7)eq), a type of hyperconjugative interaction. Keywords: NMR spectroscopy; piperidone; spin–spin coupling constant; stereoelectronic effect; X-ray diffraction structure; Introduction Stereoelectronic effects have attracted the attention of many researchers with an interest in organic chemistry

A facile synthetic route to benzimidazolium salts bearing bulky aromatic N-substituents

• Gabriele Grieco,
• Olivier Blacque and
• Heinz Berke

Beilstein J. Org. Chem. 2015, 11, 1656–1666, doi:10.3762/bjoc.11.182

• and elusive compound 2-Cl could obtained in this way (X-ray diffraction structure displayed in Figure 3). The yields of 1-Cl and 2-Cl were 68% and 28%, respectively. The previous synthesis of 1-Cl by Borguet and co-workers [42] required 4 steps. All the other earlier preparations and the preparation

Chiral gels derived from secondary ammonium salts of (1R,3S)-(+)-camphoric acid

• Tapas Kumar Adalder,
• N. N. Adarsh,
• Ravish Sankolli and
• Parthasarathi Dastidar

Beilstein J. Org. Chem. 2010, 6, 848–858, doi:10.3762/bjoc.6.100

• powder X-ray diffraction. Structure property correlation based on X-ray diffraction techniques remain inconclusive indicating that some of the integrated part associated with the gelation phenomena requires a better understanding. Keywords: crystal engineering; LMOG; single crystal X-ray diffraction