A highly diastereoselective synthesis of 3-substituted isoindolin-1-one dericatives
摘要:
A highly diastereoselective method for the synthesis of 3-substituted isoindolin-1-ones has been developed through application of a tricyclic lactam substrate as an N-acyliminium ion precursor. Ring-opening of the tricyclic lactam with triethylsilane as hydride source generates the targets with up to exclusive levels of diastereoselectivity. This approach compliments that reported in the preceding paper. (C) 1998 Elsevier Science Ltd. All rights reserved.
A one-pot and highly diastereoselective method for the reductive dehydroxylation of three classes of heterocyclic N,O-acetals with general structure 4 is reported. The method features a 'two in one' concept, namely, by synergetic action of two complementary Lewis acids (BF.OEt2 and TiCl4), the bicyclic or tricyclic oxazololactams 5 were formed in situ and reductively cleaved to give the corresponding lactams 6 in a high-yielding and highly diastereoselective manner. (C) 2009 Elsevier Ltd. All rights reserved.
A highly diastereoselective synthesis of 3-substituted isoindolin-1-one dericatives
作者:Steven M. Allin、Christopher J. Northfield、Michael I. Page、Alexandra M.Z. Slawin
DOI:10.1016/s0040-4039(98)80042-7
日期:1999.1
A highly diastereoselective method for the synthesis of 3-substituted isoindolin-1-ones has been developed through application of a tricyclic lactam substrate as an N-acyliminium ion precursor. Ring-opening of the tricyclic lactam with triethylsilane as hydride source generates the targets with up to exclusive levels of diastereoselectivity. This approach compliments that reported in the preceding paper. (C) 1998 Elsevier Science Ltd. All rights reserved.