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

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


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

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