Enantioselective synthesis of 4-aminocyclopent-2-ene-1-one from tricyclo[5.2.1.02,6]decenyl enaminones
作者:Namakkal G. Ramesh、Antonius J.H. Klunder、Binne Zwanenburg
DOI:10.1016/s0040-4039(97)10820-6
日期:1998.3
An efficient enantioselective synthesis of 4-amino-cyclopent-2-ene-1-one 12 from enaminones 8 and and its diastereomer has been accomplished via a one step electron transfer reduction of the enaminone double bond and concomitant removal of an alpha-methylbenzyl group, followed by a [4 + 2] cycloreversion strategy. (C) 1998 Elsevier Science Ltd. All rights reserved.
Enantioselective Synthesis of 4-Acetylaminocyclopent-2-en-1-ols from Tricyclo[5.2.1.0<sup>2,6</sup>]decenyl Enaminones. Precursors for 5‘-Norcarbocyclic Nucleosides and Related Antiviral Compounds
作者:Namakkal G. Ramesh、Antonius J. H. Klunder、Binne Zwanenburg
DOI:10.1021/jo982498h
日期:1999.5.1
6)]deca-4,8-dien-3-ones 14 and 15. N-Acetylation of both 15 and 14 followed by single electron-transfer reduction using lithium in liquidammonia afforded diastereomeric mixtures of beta-amino ketones 26 and 27 and of ent-26 and ent-27 in high yields and with high diastereoselectivity. In this reduction process, the enaminone double bond is reduced with the concomitant removal of the alpha-methylbenzyl