Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The first mild retrodiene processes resulting in bicyclic heterocycles are described. From norbornene and -β-amino acids with chloroalkyl isothiocyanates, compounds 3–6 were prepared, which, by retrodiene decomposition, furnished 7 and 8. ... From norbornene diexo- and ...