Helmut Stamm

Relative ring current effects based on a new model for aromatic-solvent-induced shift

Helmut Stamm, Hannelore. Jaeckel · Journal of the American Chemical Society · 1989 · 58 citations

Aromatic-solvent-induced Shift, Engineering, Chemical Analysis +18

Reactions with aziridines. 48. Friedel-Crafts reactions with N-sulfonated aziridines and with open-chain sulfonamides. Sulfonamides as leaving groups in open-chain structures

Helmut Stamm, Andreas Onistschenko, B. BUCHHOLZ et al. · The Journal of Organic Chemistry · 1989 · 45 citations

Open-chain Structures, Chemical Measurement, Engineering +13

Reactions with aziridines. 33. Arene hydrides. Part 1. Highly regioselective ring cleavage of N-acylaziridines by "anthracene hydride" (anion of 9,10-dihydroanthracene). Intermediacy of a carbonyl adduct. Influence of nitrogen inversion on the ring opening

Helmut Stamm, Andreas Sommer, Anton Woderer et al. · The Journal of Organic Chemistry · 1985 · 43 citations

Engineering, Heterocyclic, Biochemistry +10

Homolytic aziridine opening (aza variant of cyclopropylcarbinyl-homoallyl rearrangement) by addition of tributyltin radical to N-acylaziridines. Factors contributing to the regioselectivity

Jürgen Werrya, Helmut Stamm, Pen-Yuan Lin et al. · Tetrahedron · 1989 · 39 citations

Homolytic Aziridine Opening, Engineering, Heterocyclic +6

Acylated 2,2-dimethylaziridines: regioselectivity of ring opening by sodium thiophenolate; borderline SN2 due to planarization of nitrogen pyramid

Pen-Yuan Lin, Konstantinos Bellos, Helmut Stamm et al. · Tetrahedron · 1992 · 33 citations

Engineering, Borderline Sn2, Organic Chemistry +7