The asymmetric unit of the title compound, C(23)H(27)Cl(2)N(3)O, contains two crystallographically independent mol-ecules in which the dihedral angles between the benzene rings are 70.1 (3) and 63.8 (3)°. In each mol-ecule an intra-molecular N-H⋯O hydrogen bond generates an S(7) ring. The atoms of the propyl grouping of one mol-ecule are disordered over two orientations with occupancies of 0.666 (6) and 0.334 (6). The crystal structure is stabilized by N-H⋯O and C-H⋯O hydrogen-bonding inter-actions.
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http://dx.doi.org/10.1107/S1600536809054695 | DOI Listing |
J Am Chem Soc
January 2025
BioCIS, Faculté de Pharmacie, Université Paris-Saclay, CNRS, Orsay 91400, France.
The endoperoxide scaffold is found in numerous natural products and synthetic substances of pharmaceutical interest. The main challenge to their synthetic access remains the preparation of chiral compounds due to the weakness of the peroxide bond, which limits the scope of available or applicable methods. Here, we demonstrate how peroxycarbenium species can be trapped by silylated nucleophiles with high enantioselectivities and diastereoselectivities when applicable, using a chiral imidophosphorimidate (IDPi) as a catalyst.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China.
-cycloalkenes are abundant in bioactive natural products and have been used as powerful tools in chemical biology and drug discovery. However, strategies for the modular synthesis of -cycloalkenes, especially planar-chiral medium-sized ones, with high efficiency and selectivity, still remain elusive. Herein, we report a Pd-catalyzed asymmetric [7 + 2] cyclization strategy to address this challenge.
View Article and Find Full Text PDFAcc Chem Res
January 2025
Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China.
ConspectusThe Mannich reaction, involving the nucleophilic addition of an enol(ate) intermediate to an imine or iminium ion, is one of the most widely used synthetic methods for the synthesis of β-amino carbonyl compounds. Nevertheless, the homo-Mannich reaction, which utilizes a homoenolate intermediate as the nucleophilic partner and provides straightforward access to the valuable γ-amino carbonyl compounds, remains underexplored. This can be largely attributed to the difficulties in generation and manipulation of the homoenolate species, despite various homoenolate equivalents that have been developed.
View Article and Find Full Text PDFChemistry
January 2025
Hefei University of Technology, School of Food and Biological Engineering, Tunxi Road 193, Hefei, CHINA.
Factor XIa (FXIa) is a plasma protease that plays a crucial role in the intrinsic pathway of blood coagulation, making it a promising target for antithrombotic therapy. Circular DNA aptamers, with their dramatically enhanced biological and structural stability, hold great potential as new-generation DNA-based anticoagulants. However, the functional selection and large-scale synthesis of them remains a substantial challenge.
View Article and Find Full Text PDFAm J Sports Med
January 2025
Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK.
Background: Residual interlimb deficits after anterior cruciate ligament reconstruction (ACLR) can lead to functional maladaptation and increase the risk of reinjury. The tuck jump assessment (TJA) may offer a more effective evaluation of ACLR status as compared with traditional tasks owing to increased risk of altered landing mechanics, asymmetrical landing, and increased knee valgus attributed to the cyclical nature of the task. However, it remains unclear whether altered TJA kinetics resolve over time or persist through return-to-play phases of rehabilitation.
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