K. Miklo et al., DIRECT AND INDIRECT RADICAL DENITRATIONS OF INTERMEDIATES IN THE SYNTHESIS OF SORGOLACTONE AND ITS NUCLEAR ANALOGS, Tetrahedron letters, 37(20), 1996, pp. 3491-3494
Denitration of various important intermediates in the synthesis of sor
golactone and its analogs using radical chemistry on nitroketones or o
n the derived isocyanides is described The nitro group is needed for t
he first step of the annellation process, the Michael addition of subs
tituted nitroalkanes to cyclopentenones. Then it can be removed direct
ly or after reduction to the amine or via the ketone obtained by the N
ef-reaction. Copyright (C) 1996 Elsevier Science Ltd