Stability and reactivity control of carbenoids: recent advances and perspectives

VH Gessner - Chemical Communications, 2016 - pubs.rsc.org
Metal carbenoids such as lithium or Simmons–Smith-type reagents are widely used in
organic synthesis, particularly in cyclopropanation and homologation reactions. These …

[HTML][HTML] Structurally stimulated deprotonation/alumination of the TMP anion

B Conway, AR Kennedy, RE Mulvey… - … (International ed. in …, 2010 - ncbi.nlm.nih.gov
Derived from the cyclic secondary amine 2, 2, 6, 6-tetramethylpiperidine [TMP (H)] by
removal of its nitrogen-attached hydrogen atom, the TMP anion 1 has had a 40 year career …

Lithiation of Diamine Ligands to Chiral Building Blocks: Syntheses, Selectivities, and Lithiated Intermediates

VH Gessner, C Strohmann - Organometallics, 2010 - ACS Publications
The direct deprotonation of the chiral nitrogen ligands (R, R)-TECDA (2) and (R, R)-
TEMCDA (6) with tert-butyllithium to highly reactive building blocks is reported. The …

Subtle Size Effects in C–H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases

D Bojer, B Neumann, HG Stammler, NW Mitzel - 2011 - Wiley Online Library
Abstract The reaction of Pr (AlMe4) 3 with 1, 3, 5‐trimethyl‐1, 3, 5‐triazacyclohexane
(TMTAC) leads to the formation of two isomeric products by C–H activation of the AlMe4 …

A Chain Aggregate of Methyllithium Tetramers

I Kamps, B Neumann, HG Stammler, NW Mitzel - Organometallics, 2010 - ACS Publications
The reactions of 1, 3, 5-trimethyl-1, 3, 5-triazacyclohexane, TMTAC, with methyllithium
(MeLi) in the absence or presence of the Lewis acid trimethylaluminum (AlMe3) give …

Silylation products of cyclic tri-aminal carbanions and their lithiation

C Sicking, A Mix, B Neumann, HG Stammler… - Dalton …, 2012 - pubs.rsc.org
The structure of 1, 3, 5-trimethyl-1, 3, 5-triaza-cyclohexane (TMTAC) was determined by
single crystal X-ray diffraction and compared with earlier gas-phase data. It shows a …

α‐Lithiated (R,R)‐TMCDA as an Efficient Building Block for the Preparation of Chiral N,N,O Ligands by Asymmetric 1,2‐Addition

VH Gessner, B Fröhlich, C Strohmann - 2010 - Wiley Online Library
Abstract The chiral diamine (1R, 2R)‐N, N, N′, N′‐tetramethylcyclohexane‐1, 2‐diamine
[(R, R)‐TMCDA, 3] has been selectively deprotonated at one of its methyl groups by a series …

Three different product types from reactions of lithiated cyclic aminals with trivalent organometal chlorides

BJ Hellmann, I Kamps, A Mix, B Neumann… - Chemical …, 2010 - pubs.rsc.org
The reaction of 2-lithio-1, 3, 5-trimethyl-1, 3, 5-triazacyclohexane with YCp2Cl leads to the
formation of a donor-functionalised mono-anionic amide ligand, 1, 3, 5-trimethyl-2 …

Explanation of Different Regioselectivities in the ortho‐Lithiation of Ferrocenyl(phenyl)methanamines

A Almássy, A Škvorcová, B Horváth… - European Journal of …, 2013 - Wiley Online Library
Diastereoselective ortho‐lithiation of ferrocenes is a principal strategy for the synthesis of
chiral ferrocene ligands. Dilithiation of (R)‐1‐(2‐bromophenyl)‐1‐ferrocenyl‐N, N …

Complex Formation of Calcium Bis (tetraethylaluminate) with N‐Donor Ligands

M Hülsmann, B Neumann… - European Journal of …, 2012 - Wiley Online Library
Abstract Treatment of calcium bis (tetraethylaluminate) with the bidentate N‐donor ligands
tetramethylmethylenediamine (L= TMMDA), tetramethylethylenediamine (L= TMEDA) and N …