One-pot stereoselective synthesis of dimethanodibenzo[e,i][1,4]diazecines by a zinc-acetic acid promoted cascade reaction
摘要:
The title compounds interesting C-2 symmetrical diamines. They were prepared in a one-pot process by reacting quinaldines with a zinc-acetic acid mixture in THF solution. During this simple and stereoselective process, two C-C bonds and 4 stereogenic centres are created under mild conditions. Influence of the concentration of reagents upon yields and intramolecular cyclization regiochemistry is demonstrated. Experiments using deuteriated acetic acid allowed a good understanding of these results. (C) 1999 Elsevier Science Ltd. All rights reserved.
The title compounds interesting C-2 symmetrical diamines. They were prepared in a one-pot process by reacting quinaldines with a zinc-acetic acid mixture in THF solution. During this simple and stereoselective process, two C-C bonds and 4 stereogenic centres are created under mild conditions. Influence of the concentration of reagents upon yields and intramolecular cyclization regiochemistry is demonstrated. Experiments using deuteriated acetic acid allowed a good understanding of these results. (C) 1999 Elsevier Science Ltd. All rights reserved.