R. Helder - Concepedia

Author

R. Helder

University of Groningen

Also Known As

R. HELDER, R. Helder

Publications

638

Citations

H-Index

Concepts

All Affiliations

University of Groningen

About

R. Helder is an author at University of Groningen specializing in organic chemistry, chemistry, and engineering.

Top Concepts

#	Concept	H-Index	Publications	Citations
1	Engineering	3	3	232
2	Biochemistry	3	3	264
3	Biomolecular Engineering	2	2	33
4	Natural Sciences	1	1	78
5	Chemical Engineering	1	1	199

R. Helder

Publications

604

Citations

H-Index

Page 1

	Year	Citations
Catalytic asymmetric induction in oxidation reactions. The synthesis of optically active epoxides. R. Helder, Jan C. Hummelen, R. W. P. M. LAANE, Tetrahedron Letters Chemical EngineeringCatalytic Asymmetric InductionOxidation ReactionsPhotochemistryEngineering	1976	199
Asymmetric induction in the alkaloid-catalysed Michael reaction Hans Wynberg, R. Helder Tetrahedron Letters BiochemistryOrganic ChemistryAsymmetric InductionAsymmetric CatalysisEnantioselective Synthesis	1975	172
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, Tetrahedron Letters Enantiomeric ExcessBiochemistryNatural SciencesOrganic ChemistryAsymmetric Synthesis Iii	1977	78
The diels-alder reaction of thiophene R. Helder, Hans Wynberg Tetrahedron Letters HeterocyclicAlkene MetathesisOrganic ChemistryChemistryHeterocycle Chemistry	1972	44
[2+2]cycloaddition of substituted thiophenes to acetylenes David N. Reinhoudt, H. C. Volger, C. G. KOUWENHOVEN, Tetrahedron Letters HeterocyclicOrganic ChemistrySubstituted ThiophenesChemistryHeterocycle Chemistry	1972	28
Reactions of diazomethane with sulfonyl-activated double bonds R. Helder, T. Doornbos, J. Strating, Tetrahedron HeterocyclicOrganic ChemistryChemistrySynthetic ChemistrySulfonyl-activated Double Bonds	1973	22
The synthesis of [2.2](9,10)anthraceno(2,5)furanophane and its reaction with dimethyl acetylenedicarboxylate. Hans Wynberg, R. Helder Tetrahedron Letters EngineeringDimethyl AcetylenedicarboxylateOrganic ChemistryOrganometallic CatalysisChemistry	1971	18
The diels-alder addition of dicyanoacetylene to [8] (2,5)furanophane; the synthesis of a paddlane R. Helder, Hans Wynberg Tetrahedron Letters EngineeringHeterocyclicAlkene MetathesisOrganic ChemistryDiels-alder Addition	1973	15
A one-step ring enlargement of a thiophene to a thiepin Hans Wynberg, R. Helder Tetrahedron Letters BiophysicsPhysicsOne-step Ring Enlargement	1972	14
The t-butylation of \|8\|(2,5)thiophenophane R. Helder, Hans Wynberg Tetrahedron BiochemistryOrganic ChemistryHeterocycle ChemistryNatural Product SynthesisEnantioselective Synthesis	1975	14

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