Unprecedented intramolecular nitrile imine cycloadditions onto a thiophene ring are described as a synthetic route to a number of tricyclic pyrazoline derivatives (5). Diadducts 6 and 7, which can be ascribed to a sequential intra-intermolecular cycloaddition pathway, are also formed.
Dipolarophilic behaviour of the thiophene ring in intramolecular nitrile imine cycloadditions / G. Broggini, L. Garanti, G. Molteni, G. Zecchi. - In: JOURNAL OF THE CHEMICAL SOCIETY. PERKIN TRANSACTIONS. I. - ISSN 0300-922X. - :24(1998), pp. 4103-4106.
Dipolarophilic behaviour of the thiophene ring in intramolecular nitrile imine cycloadditions
G. Molteni;
1998
Abstract
Unprecedented intramolecular nitrile imine cycloadditions onto a thiophene ring are described as a synthetic route to a number of tricyclic pyrazoline derivatives (5). Diadducts 6 and 7, which can be ascribed to a sequential intra-intermolecular cycloaddition pathway, are also formed.
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