2-Methyl-6-nitrobenzoic anhydride

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2-Methyl-6-nitrobenzoic anhydride
Names
Preferred IUPAC name
2-Methyl-6-nitrobenzoic anhydride
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.156.789 Edit this at Wikidata
UNII
  • InChI=1S/C16H12N2O7/c1-9-5-3-7-11(17(21)22)13(9)15(19)25-16(20)14-10(2)6-4-8-12(14)18(23)24/h3-8H,1-2H3
    Key: YEKPNMQQSPHKBP-UHFFFAOYSA-N
  • InChI=1/C16H12N2O7/c1-9-5-3-7-11(17(21)22)13(9)15(19)25-16(20)14-10(2)6-4-8-12(14)18(23)24/h3-8H,1-2H3
    Key: YEKPNMQQSPHKBP-UHFFFAOYAB
  • CC1=C(C(=CC=C1)[N+](=O)[O-])C(=O)OC(=O)C2=C(C=CC=C2[N+](=O)[O-])C
Properties
C16H12N2O7
Molar mass 344.279 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

2-Methyl-6-nitrobenzoic anhydride is an organic acid anhydride also known as the Shiina reagent,[1][2] having a structure wherein carboxylic acids undergo intermolecular dehydration condensation. It was developed in 2002 by Prof. Isamu Shiina (Tokyo University of Science, Japan).[3] The compound is often abbreviated MNBA.

Abstract

The reagent is used for synthetic reactions wherein medium- and large-sized lactones are formed from hydroxycarboxylic acids via intramolecular ring closure (Shiina macrolactonization).[4][5] The reaction proceeds at room temperature under basic or neutral conditions. This reagent can be used not only for macrolactonization but also for esterification, amidation, and peptide coupling.

See also

References

  1. ^ "Named Reagents". OChemOnline. Archived from the original on 2017-09-04.
  2. PMID 28741352
    .
  3. doi:10.1246/cl.2002.286
    .
  4. PMID 15058924
    .
  5. doi:10.1246/bcsj.20130216
    .

External links
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