R. Helder

Catalytic asymmetric induction in oxidation reactions. The synthesis of optically active epoxides.

R. Helder, Jan C. Hummelen, R. W. P. M. LAANE et al. · Tetrahedron Letters · 1976 · 199 citations · Full text

Chemical Engineering, Catalytic Asymmetric Induction, Oxidation Reactions +8

Asymmetric induction in the alkaloid-catalysed Michael reaction

Hans Wynberg, R. Helder · Tetrahedron Letters · 1975 · 172 citations

Biochemistry, Organic Chemistry, Asymmetric Induction +2

Alkaloid catalyzed asymmetric synthesis III the addition of mercaptans to 2-cyclohexene-1-one; determination of enantiomeric excess using 13C NMR.

R. Helder, Renate Arends, W. Bolt et al. · Tetrahedron Letters · 1977 · 78 citations

Enantiomeric Excess, Biochemistry, Natural Sciences +8

The diels-alder reaction of thiophene

R. Helder, Hans Wynberg · Tetrahedron Letters · 1972 · 44 citations

Heterocyclic, Alkene Metathesis, Organic Chemistry +3

[2+2]cycloaddition of substituted thiophenes to acetylenes

David N. Reinhoudt, H. C. Volger, C. G. KOUWENHOVEN et al. · Tetrahedron Letters · 1972 · 28 citations

Heterocyclic, Organic Chemistry, Substituted Thiophenes +3