5-Substituted-1H-tetrazoles (RCN4H) are often used as metabolism-resistant isosteric replacements for carboxylic acids (RCO2H) in SAR-driven medicinal chemistry analogue syntheses. This review provides a brief summary of the medicinal chemistry of tetrazolic acids and highlights some examples of tetrazole-containing drug substances in the current literature. A survey of representative literature procedures for the preparation of 5-substituted-1H-tetrazoles, focusing on preparations from aryl and alkyl nitriles, is presented in sections by generalized synthetic methods.
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http://dx.doi.org/10.1016/s0968-0896(02)00239-0 | DOI Listing |
J Org Chem
January 2025
Department of Chemistry, Chung Yuan Christian University, Chung-Li 320314, Taiwan.
This study explores the selective oxidative scission of bicyclo[2.2.2]octenones derived from masked -benzoquinones (MOBs).
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 201210, China.
The emergence of spinon quasiparticles, which carry spin but lack charge, is a hallmark of collective quantum phenomena in low-dimensional quantum spin systems. While the existence of spinons has been demonstrated through scattering spectroscopy in ensemble samples, real-space imaging of these quasiparticles within individual spin chains has remained elusive. In this study, we construct individual Heisenberg antiferromagnetic spin-1/2 chains using open-shell [2]triangulene molecules as building blocks.
View Article and Find Full Text PDFJ Med Chem
January 2025
Centro Singular de Investigación en Química Biolóxica y Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
Org Lett
January 2025
Pfizer Oncology Medicinal Chemistry, San Diego, California 92121, United States.
Sulfonamides are prevalent functional groups represented in both natural and pharmaceutical products. The synthesis of sulfonamides is often straightforward when using nucleophilic amines and electrophilic sulfonyl chlorides. When reactivity challenges arise for nontraditional substrates, harsh conditions or new synthetic routes may be required.
View Article and Find Full Text PDFTher Deliv
January 2025
Medical Biomaterials Research Center (MBRC), Tehran University of Medical Sciences, Tehran, Iran.
Aim: The study aimed to formulate solid lipid nanoparticles (SLNs) for the transdermal delivery of PPL to improve skin retention and efficacy.
Materials And Method: The particle size distribution of SLNs was determined and the morphology of SLNs was also analyzed by SEM. , and evaluations were done for PPL loaded SLN.
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