Synthesis 2021; 53(23): 4501-4506
DOI: 10.1055/a-1541-4939
paper

Synthesis of Longhorn Beetle Pheromone Components by Proline-Mediated α-Hydroxylation of Alkyl Ketones

Authors

  • Hugo do Carmo

    a   Departamento de Química del Litoral, Centro Universitario Regional Litoral Norte, Universidad de la República, Ruta 3 km 363, Paysandú 60000, Uruguay
  • María Eugenia Amorós

    b   Laboratorio de Ecología Química, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo 11800, Uruguay
  • Andrés González

    b   Laboratorio de Ecología Química, Facultad de Química, Universidad de la República, General Flores 2124, Montevideo 11800, Uruguay
  • Viviana Lucía Heguaburu

    a   Departamento de Química del Litoral, Centro Universitario Regional Litoral Norte, Universidad de la República, Ruta 3 km 363, Paysandú 60000, Uruguay

Programa de Desarrollo de Ciencias Básicas (PEDECIBA- PNUD/URU/06/004), Agencia Nacional de Investigación e Innovación (ANII).


Graphical Abstract

Preview

Abstract

The stereoselective synthesis of several components of the aggregation pheromones of numerous longhorn beetle species is described. These attractants consist of 3-hydroxy-2-alkanones and 2,3-alkyldiols­ with chain lengths varying from six to ten carbons. The 3R- and 3S-series are generated by organocatalytic α-hydroxylation of alkyl ketones with nitrosobenzene in the presence of l- or d-proline, respectively, to obtain the hydroxyketones in high enantiomeric excess. Further reduction and chromatographic separation lead to the enantiomerically pure diols that complete the library.

Supporting Information



Publikationsverlauf

Eingereicht: 14. Juni 2021

Angenommen nach Revision: 30. Juni 2021

Accepted Manuscript online:
30. Juni 2021

Artikel online veröffentlicht:
05. August 2021

© 2021. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany