The first successful Pd(II)-catalysed aminocarbonylation of the highly substituted benzylaminoalkene 5 allo ws the direct preparation of fused piperidine lactones 3 and 4, which are subsequently converted to the novel C-6 homologue of 1-deoxynojirimycin 1 and 1-deoxy-L-idonojirimycin 2. The study of the influence of various catalytic conditions on the diastereoselectivity and product distribution of the key amino-carbonylation is presented. (C) 2000 Elsevier Science Ltd. All rights reserved.
Total synthesis of new C-6 homologues of 1-deoxynojirimycin and 1-deoxy-l-idonojirimycin
Novel piperidine lactones 1 and 2, which represent direct precursors to the new C-6 homologues of 1-deoxynojirimycin (3) and 1-deoxy-L-idonojirimycin 4, were prepared by key PdII-catalysed aminocarbonylation of protected aminoalkene 10.