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Ernst Schaumann
Researcher at Clausthal University of Technology
Publications - 349
Citations - 2990
Ernst Schaumann is an academic researcher from Clausthal University of Technology. The author has contributed to research in topics: Cycloaddition & Thioketene. The author has an hindex of 26, co-authored 349 publications receiving 2944 citations. Previous affiliations of Ernst Schaumann include University of Hamburg.
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Journal ArticleDOI
Cycloaddition reactions of heterocumulenes, xiv. 1,4‐dipoles from persubstituted guanidines and heterocumulenes
TL;DR: In this article, the Guanidin reagiert mit aktivierten Isocyanaten (IIa)-(IIc), Isothiochenaten (VII) bzw. mit CS2 (XIII) glatt zu stabilen Dipolen (III), (VIII),(VIII, V.B., XIV) [Protonierung - (IV, (IX); Methylierung -(X, (X), (XV)].
Journal ArticleDOI
Silicon‐ and Sulfur‐Mediated Synthesis of Benzoannulated Cyclooctanols.
Florian Genrich,Ernst Schaumann +1 more
TL;DR: The reaction of a silyl-substituted thioacetal with ortho-difunctionalized benzenes as biselectrophiles allows access to multifunctional cyclooctanols as discussed by the authors.
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Cycloadditionsreaktionen von heterokumulenen 4. mitt. reaktion von dimethylketen-o,n-acetalen mit iso(thio)cyanaten
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Cycloaddition reactions of heterocumulenes. xvii. on the mechanism of the (2 + 2) cycloaddition of thioketenes with azomethines
Ernst Schaumann,Jörn Ehlers +1 more
Journal ArticleDOI
Thiophile addition von phenyllithium an thioketene
Ernst Schaumann,Wolfgang Walter +1 more
TL;DR: In this article, at room temperature α-elimination occurs in the carbenoids 2b-d with formation of the alkyliden carbenes 15b−d, which react further to yield the butatrienes 13b−D, the alkenes 14b-D, and in the case of 15d to give the CH-insertion product 16.