H. H. Haeck
Philips
7 Papers
53 Citations
H. H. Haeck is an academic researcher from Philips. The author has contributed to research in topics: Polyene & Condensation. The author has an hindex of 4, co-authored 7 publications.
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Papers
Investigations on herbicides II: 2-Alkyloxy- and 2-aryloxy -4,6-dichloro-1,3,5-triazines 2-Alkylthio- and 2-arylthio-4,6-dichloro-1,3,5-triazines
TL;DR: An improved synthesis of 4,6-dichloro-2-phenoxy-1,3,5,-triazine from cyanuric chloride and phenol in the presence of collidine (2,4,6,trimethyl-pyridine) induced as mentioned in this paper to investigate the scope and limitation of the substitution of one chlorine atom in CCL and the influence of the base used as an acid acceptor.
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Reserpine analogues: I. β-Indolylethylamine derivatives†
TL;DR: The synthesis of a series of compounds resembling in some respects the alkaloid reserpine is described in this paper, which are β-indolylelethylamine (tryptamine) derivatives.
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Syntheses of carotenoidal compounds. III: Condensation of polyene-aldehydes with 1,4-dicyano-2-butene†
H. H. Haeck,T. Kralt +1 more
TL;DR: In this paper, the preparation, reactions and spectra of condensation products of β15-, β17-, β20- and β22-aldehyde with 1,4-dicyano-2-butene were described.
11
Syntheses of carotenoidal compounds. I. Preparation of some substituted polyenes with a cross-conjugation
TL;DR: In this paper, the synthesis and absorption spectra of retinal and retinylideneacetone with several cyanoacetic esters and related compounds are reported, in the visible light.
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Syntheses of carotenoidal compounds IV carotene‐α, β‐dicarboxylic acids
H. H. Haeck,T. Kralt +1 more
TL;DR: According to the wavelengths of their absorption maxima in UV and visible light these compounds exhibit a high degree of steric hindrance as mentioned in this paper, and the synthesis of carotene-α,β-dicarboxylic acids by means of Stobbe condensations is described.
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