Formation of heterocyclic products in michael reactions of ascorbic acid with α,β-unsaturated compounds. 3rdcommunication . Structural analysis of michael adducts of ascorbic acid by13C-nmr spectroscopy in the solid state

1992 ◽  
Vol 29 (5) ◽  
pp. 1225-1228 ◽  
Author(s):  
Kurt Eger ◽  
Mathias Schmidt ◽  
Klaus Albert ◽  
Jutta Schmid
Keyword(s):  
Ascorbic Acid ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Unsaturated Compounds ◽  
Michael Reactions ◽  
Michael Adducts

Reaction of 9-Borabicyclo[3.3.1]nonane with Alkyn-1-yltin Compounds. Molecular Structure of the 9-Propyn-1-yl-9-borabicyclo[3.3.1]nonane Pyridine Adduct

2009 ◽  
Vol 64 (4) ◽  
pp. 399-402 ◽  
Author(s):  
Bernd Wrackmeyer ◽  
Christoph Bihlmayer ◽  
Khadija Shahid ◽  
Wolfgang Milius
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Side Reaction ◽  
Bulky Substituent ◽  
X Ray ◽  
Exchange Product

Trimethyl- and triethyl(propyn-1-yl)tin react with 9-borabicyclo[3.3.1.]nonane (9-BBN) mainly by exchange of the propynyl group against hydrogen, accompanied by numerous side reaction. This is in contrast to the findings for other alkynyltin compounds bearing a second bulky substituent at the C≡C bond. The exchange product, 9-propyn-1-yl-9-borabicyclo[3.3.1]nonane, was isolated as its crystalline pyridine adduct and fully characterised by NMR spectroscopy in solution and X-ray structural analysis in the solid state.

Surface structural analysis of selectively 13C-labeled cellulose II by solid-state NMR spectroscopy

Cellulose ◽  
2019 ◽  
Vol 27 (4) ◽  
pp. 1899-1907 ◽  
Author(s):  
Yusuke Kita ◽  
Ryosuke Kusumi ◽  
Tsunehisa Kimura ◽  
Motomitsu Kitaoka ◽  
Yusuke Nishiyama ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Solid State Nmr ◽  
Cellulose Ii ◽  
Solid State Nmr Spectroscopy
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