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N. L. J. M. Broekhof

Leiden University

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Tetrahedron Letters | 1979

Enamine synthesis by the Horner-Wittig reaction

N. L. J. M. Broekhof; F. L. Jonkers; A. Van Der Gen

Abstract Aromatic and aliphatic aldehydes can be converted into their homologous enamines by Horner-Wittig reaction with N -morpholinomethyl diphenylphosphine oxide ( 1 ).

Tetrahedron Letters | 1980

N-methyl-N-anilinomethyl diphenylphosphine oxide: a versatile reagent for the synthesis of enamines

N. L. J. M. Broekhof; F. L. Jonkers; A. Van Der Gen

Abstract Cyclic as well as acyclic ketones, both saturated and α,β-unsaturated, can be converted into their homologous enamines by Horner-Wittig reaction with N -methyl- N -anilinomethyl diphenylphosphine oxide ( 3 ).

Tetrahedron Letters | 1981

Novel applications of α-aminosubstituted diphenylphosphine oxides. The conversion of aldehydes into α-aminomethylketones.

N. L. J. M. Broekhof; Arne van der Gen

Abstract Aromatic and aliphatic aldehydes (R 3 CHO) can be converted into α-aminomethyl-ketones (R 3 COCH 2 NR 1 R 2 ) via reaction with (α-aminomethyl)diphenylphosphine oxides.

Tetrahedron Letters | 1977

Synthetic applications of 2-chloro-1,3-dithiane preparation of ketene dithioacetals

C. G. Kruse; N. L. J. M. Broekhof; A. Wijsman; A. Van Der Gen

Recueil des Travaux Chimiques des Pays-Bas | 2010

Enamine synthesis using the Horner‐Wittig reaction. Part 1. (Aminomethyl)diphenylphosphine oxides, new formyl anion equivalents

N. L. J. M. Broekhof; A. Van Der Gen

Tetrahedron Letters | 1976

Protection of hydroxyl- and thiol groups as 2′-0-tetrahydrofuranyl-(THF)-ethers.

C. G. Kruse; N. L. J. M. Broekhof; A. Van Der Gen

Recueil des Travaux Chimiques des Pays-Bas | 2010

The synthesis of α-amino-substituted diphenylphosphine oxides

N. L. J. M. Broekhof; P. Van Elburg; A. Van Der Gen

Recueil des Travaux Chimiques des Pays-Bas | 2010

Enamine synthesis using the Horner‐Wittig reaction. Part 2. New acyl anion equivalents derived from (aminomethyl)diphenylphosphine oxides

N. L. J. M. Broekhof; P. Van Elburg; D. J. Hoff; A. Van Der Gen

Recueil des Travaux Chimiques des Pays-Bas | 2010

Characteristic odoriferous compounds of brown algae: Syntheses of possible oxidation products of (6Z, 9Z, 12Z, 15Z)‐1,6,9,12,15‐heneicosapentaene and (6Z, 9Z, 12Z, 15Z, 18Z)‐1,6,9,12,15,18‐heneicosahexaene

N. L. J. M. Broekhof; Jan G. Witteveen; Anton J. A. van der Weerdt

Recueil des Travaux Chimiques des Pays-Bas | 2010

Synthesis of indoles using (N-arylaminomethyl)diphenylphosphine oxides

Jan Zorgdrager; N. L. J. M. Broekhof; Arne van der Gen

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A. Van Der Gen

Leiden University

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F. L. Jonkers

Leiden University

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P. Van Elburg

Leiden University

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A. Wijsman

Leiden University

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Arne van der Gen

Leiden University

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C. G. Kruse

Leiden University

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D. J. Hoff

Leiden University

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Chris G. Kruse

Solvay

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Anton J. A. van der Weerdt

University of Amsterdam

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Jan Zorgdrager

Leiden University

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