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Related Concept Videos

Acid Halides to Esters: Alcoholysis01:12

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Alcoholysis is a nucleophilic acyl substitution reaction in which an alcohol functions as a nucleophile. Acid halides react with alcohol to produce esters. The mechanism proceeds in three steps:
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Kallolide A acetate pyrazoline.

Idaliz Rodríguez-Escudero1, Jeffrey Marrero, Abimael D Rodríguez

  • 1PO Box 70377, University of Puerto Rico, San Juan, PR 00936-0377, Puerto Rico.

Acta Crystallographica. Section E, Structure Reports Online
|January 20, 2012
PubMed
Summary

The crystal structure of Kallolide A Acetate Pyrazoline reveals a complex macrocyclic molecule. This natural product features fused pyrazoline and gamma-lactone rings, forming a unique two-dimensional network in its crystalline state.

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Area of Science:

  • Natural Product Chemistry
  • Crystallography
  • Organic Chemistry

Background:

  • Kallolide A Acetate Pyrazoline is a complex natural product with a unique chemical structure.
  • Understanding the three-dimensional arrangement of atoms in crystalline solids is crucial for elucidating molecular properties and interactions.

Purpose of the Study:

  • To determine the crystal structure of Kallolide A Acetate Pyrazoline.
  • To analyze the structural features, including ring systems and intermolecular interactions.

Main Methods:

  • Single-crystal X-ray diffraction was employed to obtain the crystal structure data.
  • Analysis of bond lengths, bond angles, and intermolecular contacts was performed.

Main Results:

  • The crystal structure of Kallolide A Acetate Pyrazoline (C23H28N2O5) was elucidated, featuring a 12-membered carbon macrocyclic structure.
  • Key structural elements include a tris-substituted furan ring, a planar gamma-lactone ring, and a pyrazoline ring in an envelope conformation, fused in a cis configuration.
  • Molecules form a two-dimensional network via weak C-H⋯O interactions, with an intramolecular C-H⋯O hydrogen bond also observed.

Conclusions:

  • The detailed crystal structure provides insights into the stereochemistry and conformational preferences of Kallolide A Acetate Pyrazoline.
  • The observed intermolecular interactions contribute to the formation of a stable two-dimensional network in the crystal lattice.
  • This structural information is valuable for understanding the chemical behavior and potential biological activity of this natural product.