Related Experiment Video
Updated: May 3, 2026

Microwave-Assisted Preparation of 1-Aryl-1H-pyrazole-5-amines
Published on: June 23, 2019
4-Benzyl-sulfanyl-1H-pyrazolo-[3,4-d]pyrimidine
Mohammed El Fal1, Youssef Ramli2, El Mokhtar Essassi1
1Laboratoire de Chimie Organique Hétérocyclique, URAC 21, Pôle de Compétences Pharmacochimie, Université Mohammed V-Agdal, BP 1014 Avenue Ibn Batouta, Rabat, Morocco.
This study details the crystal structure of a pyrazolo-[3,4-d]pyrimidine derivative. Molecules form dimers through hydrogen bonds in the solid state, revealing key structural insights.
Area of Science:
- Crystallography
- Organic Chemistry
- Materials Science
Background:
- Pyrazolo-[3,4-d]pyrimidine derivatives are important scaffolds in medicinal chemistry.
- Understanding the solid-state structure is crucial for drug design and material properties.
Purpose of the Study:
- To elucidate the crystal structure of the title compound (C12H10N4S).
- To investigate the intermolecular interactions and packing in the solid state.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Analysis of bond lengths, bond angles, and intermolecular interactions (hydrogen bonding).
Main Results:
- The pyrazolo-[3,4-d]pyrimidine core is nearly planar, with a maximum deviation of 0.025 Å.
- The phenyl ring is almost perpendicular to the pyrazolo-[3,4-d]pyrimidine system, with a dihedral angle of 71.42°.
- Molecules form inversion dimers through N-H⋯N hydrogen bonds in the crystal lattice.
Conclusions:
- The study provides a detailed structural characterization of the title compound.
- The observed hydrogen bonding pattern influences the crystal packing and molecular assembly.
- This structural information can guide the design of related compounds with specific properties.
More Related Videos
07:12Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
06:34Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
Published on: June 20, 2014
Related Concept Videos
Five-Membered Heterocyclic Aromatic Compounds: Overview
Basicity of Heterocyclic Aromatic Amines
NMR Spectroscopy of Benzene Derivatives
Nomenclature of Aromatic Compounds with Multiple Substituents
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Criteria for Aromaticity and the Hückel 4n + 2 Rule
For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as Hückel’s rule or...