A New Route to Acyclic Diaminocarbenes via Lithium−Halogen Exchange

2009 ◽  
Vol 11 (15) ◽  
pp. 3274-3277 ◽  
Author(s):  
David R. Snead ◽  
Ion Ghiviriga ◽  
Khalil A. Abboud ◽  
Sukwon Hong
Keyword(s):  
Halogen Exchange ◽  
Acyclic Diaminocarbenes

ChemInform Abstract: A New Route to Acyclic Diaminocarbenes via Lithium-Halogen Exchange.

ChemInform ◽  
2009 ◽  
Vol 40 (48) ◽  
pp. no-no
Author(s):  
David R. Snead ◽  
Ion Ghiviriga ◽  
Khalil A. Abboud ◽  
Sukwon Hong
Keyword(s):  
Halogen Exchange ◽  
Acyclic Diaminocarbenes

Pentaalkyl-Derivate des 2 ,3 - Dihiydro-1,3-diborols/Pentaalkyl Derivatives of the 2,3-Dihydro-1,3-diborole

1990 ◽  
Vol 45 (1) ◽  
pp. 15-18 ◽  
Author(s):  
G . Knörzer ◽  
W. Siebert
Keyword(s):  
Redox Reactions ◽  
Halogen Exchange ◽  
Derivatives Of

AbstractDouble hydroboration of acetylene, propyne-1 and t-butylacetylene with HBCl2 · OEt2/BCl3 leads to the 1,1-bis(dichloroboryl)alkanes 2d, e, f, in which halogen exchange is achieved by BI3 to give 3d, e, f. Redox reactions between butyne-2, hexyne-3 and 3 result in the formation of compounds 4, which are alkylated with AlMe3 and AlEt3 to give the pentaalkyl derivatives 1d, e, f. Reactions of 1 with [(C5H5)Co(C2H4)2] an [(C5H5)N iCO]2 lead to the complexes 5 and 6.

New Stable and Persistent Acyclic Diaminocarbenes

2015 ◽  
Vol 21 (40) ◽  
pp. 14107-14121 ◽  
Author(s):  
Tim Schulz ◽  
Daniel Weismann ◽  
Lars Wallbaum ◽  
Robin Guthardt ◽  
Charlotte Thie ◽  
...  
Keyword(s):  
Acyclic Diaminocarbenes

Third-phase catalytic activity of halogen exchange reactions in phase transfer catalytic system

1997 ◽  
Vol 52 (20) ◽  
pp. 3511-3520 ◽  
Author(s):  
Tadaatsu Ido ◽  
Takanobu Yamamoto ◽  
Gong Jin ◽  
Shigeo Goto
Keyword(s):  
Catalytic Activity ◽  
Catalytic System ◽  
Phase Transfer ◽  
Exchange Reactions ◽  
Third Phase ◽  
Halogen Exchange

Halogen exchange by reaction of CpRu(Cl)(PPh3)2 with MeC(O)X (X = Br, I) and its mechanistic study

2014 ◽  
Vol 769 ◽  
pp. 34-37 ◽  
Author(s):  
Hitoshi Kuniyasu ◽  
Atsushi Sanagawa ◽  
Takuya Nakajima ◽  
Takanori Iwasaki ◽  
Nobuaki Kambe ◽  
...  
Keyword(s):  
Mechanistic Study ◽  
Halogen Exchange

Méthylhalogénocyclopropanation des éthoxy-alcènes diversement alkylés. Identification stéréochimique des adduits et étude de la stéréosélectivité

1982 ◽  
Vol 60 (15) ◽  
pp. 1933-1941 ◽  
Author(s):  
Roger Barlet ◽  
Raymond Le Goaller ◽  
Claude Gey
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Iodide ◽  
Intermediate Stage ◽  
Complex Salt ◽  
Carbene Complex ◽  
Iodide Ion ◽  
Halogen Exchange ◽  
C Nmr

Ethoxy-alkenes act as excellent carbene acceptors in the methylmonohalogenocyclopropanation reaction mediated by 1,1-dichloroethane and iodide-ion free methyl iodide. As well as chlorinated adducts, a large proportion of brominated products are obtained by means of halogen exchange at the carbene complex – salt intermediate stage. Adduct stereochemistry is determined by 1H and 13C nmr spectroscopy. The syn-stereoselectivity of the reaction is discussed in electronic and steric terms. [Journal Translation]

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