/ Home
/ SUBMISSION

/ The BJOC
/ Diamond Open Access
/ Journal Statistics
/ Editorial Board
/ Community
/ Call for papers

/ Latest Articles
/ Most accessed
/ Thematic issues
/ Volumes
/ Authors

/ Alerts

/ TWITTER
/ LINKEDIN
/ Mastodon
/ RSS FEED

Empty search

Article Type

Publication Date Range

Search Tips

This search combines search strings from the content search (i.e. "Full Text", "Author", "Title", "Abstract", or "Keywords") with "Article Type" and "Publication Date Range" using the AND operator.

Search Examples

aromatic	the word “aromatic”
aromatic aldehyde	the word “aromatic” OR “aldehyde”
+aromatic +aldehyde	both words “aromatic” AND “aldehyde”
+aromatic -aldehyde	the word “aromatic” but NOT “aldehyde”
“aromatic aldehyde”	the exact phrase “aromatic aldehyde”
benz*	words which begin with “benz”, such as “benzene” or “benzyl”
benz*yl	words that begin with “benz” and end with “yl”, such as “benzyl” or “benzoyl”
benzyl~	words that are close to the word “benzyl”, such as “benzoyl” (i.e., fuzzy search)

BROWSE
Latest Articles
Most accessed
thematic issues
volumes
authors

BROWSE

Latest Articles Most Accessed Thematic Issues Volumes Authors

Author

1 article(s) from Leven, Matthias

Metal-mediated aminocatalysis provides mild conditions: Enantioselective Michael addition mediated by primary amino catalysts and alkali-metal ions

Matthias Leven,
Jörg M. Neudörfl and
Bernd Goldfuss

Beilstein J. Org. Chem. 2013, 9, 155–165, doi:10.3762/bjoc.9.18

PDF

Graphical Abstract

Scheme 1: Activation of amine-bonded Michael acceptors by protonation versus Lewis acid interaction.

Jump to Scheme 1

Scheme 2: Synthesis of 4-hydroxycoumarin derivatives by Michael addition [19-27].

Jump to Scheme 2

Scheme 3: Precatalysts 5–8 and synthesis from chiral 1,2-diamines and 2-sulfobenzoic anhydrides.

Jump to Scheme 3

Figure 1: X-ray crystallographic structure of 5. The conformation of the 2-sulfobenzoic moiety is fixed by hy...

Jump to Figure 1

Figure 2: Michael acceptors employed as substrates in the nucleophilic addition of 4-hydroxycoumarin (1).

Jump to Figure 2

Scheme 4: Computationally analyzed pathways A (C-protonation), and B (N-protonation), arising from the additi...

Jump to Scheme 4

Scheme 5: Computed energy profile for reaction path A (C-protonation) and B (N-protonation) corresponding to ...

Jump to Scheme 5

Figure 3: Enantio-determining transition states arising from the addition of 4-hydroxycoumarin to cyclohexeno...

Jump to Figure 3

Figure 4: The competing enantio-determining transition structures TS-14a and TS-14g. The reason for the desta...

Jump to Figure 4

Album

Supp Info

Full Research Paper

Published 23 Jan 2013

Full text

Other Beilstein-Institut Open Science Activities

/ Help / Support & Contact / Alerts / Privacy Policy / Terms & Conditions / Impressum