51226-13-2Relevant academic research and scientific papers
Instantaneous deprotection of tosylamides and esters with Sml 2/amine/water
Ankner, Tobias,Hilmersson, Goeran
supporting information; experimental part, p. 503 - 506 (2009/07/11)
(Chemical Equation Presented) Sml2/amine/water mediates instantaneous cleavage of tosyl amides and tosyl esters. Highly hindered, sensitive and functionalized substrates were successfully deprotected in near quantitative yield.
INDOLINONES AND THEIR USE AS ANTIPROLIFERATIVE AGENTS
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Page/Page column 26, (2010/11/08)
The invention relates to indolinone compounds of formula (I), wherein Y and R1 to R8 are defined as in claim 1, which are suitable for the treatment of diseases characterized by excessive or abnormal cell proliferation and the use thereof for preparing a pharmaceutical composition.
Phenazines and natural products; novel synthesis of saphenic acid
Petersen, Lars,Jensen, Knud J.,Nielsen, John
, p. 1763 - 1766 (2007/10/03)
The natural product saphenic acid (6-(1-hydroxyethyl)1- phenazinecarboxylic acid) was synthesized from readily accessible starting materials. The desired product was obtained in an overall yield of 22% for four steps with the key steps being formation of
Aromatic Nitration under Neutral Conditions Using Nitrogen Dioxide and Ozone as the Nitrating Agent. Application to Aromatic Acetals and Acylal
Suzuki, Hitomi,Yonezawa, Shuji,Mori, Tadashi
, p. 1535 - 1544 (2007/10/03)
Cyclic acetals derived from aromatic carbonyl compounds can be nitrated smoothly with nitrogen dioxide in ice-cooled dichloromethane or acetonitrile in the presence of ozone and magnesium oxide to give ortho- and para-nitro derivatives as the major product in good combined yields, the acetal ring as a protective group remaining almost intact.An acylal derived from benzaldehyde similarly undergoes nitration on the aromatic ring to give an isomeric mixture of three nitro compounds, in which the ortho and meta isomers predominate, while aromatic orthoesters are rapidly decomposed to give simply the parent esters.Ring nitration under neutral conditions has been interpreted in terms of a nonclassical mechanism, in which nitrogen trioxide is involved as the initial electrophile.
Ozone-mediated Reaction of Aromatic Acetals and Acylal with Nitrogen Dioxide: a Novel Methodology for the Nuclear Nitration of Acid-sensitive Aromatic Compounds under Neutral Conditions
Suzuki, Hitomi,Yonezawa, Shuji,Mori, Tadashi,Maeda, Koichi
, p. 1367 - 1370 (2007/10/02)
Cyclic acetals 1c-e and 1g can be nitrated smoothly with nitrogen dioxide in ice-cooled dichloromethane in the presence of ozone and magnesium oxide to give mainly ortho- and para-nitro derivatives in good combined yields, the acetal protective group remaining almost intact; acylal 6 is similarly nitrated on the aromatic ring to give a mixture of isomeric nitro derivatives 7, in which the ortho and para isomers predominate.
18O-Isotope Effect in 13C Nuclear Magnetic Resonance Spectroscopy. 5 - Substituent Group Electronic Effects in Substituted Acetophenones
Risley, John M.,DeFrees, Shawn A.,Etten, Robert L. Van
, p. 28 - 35 (2007/10/02)
A series of para- and meta-substituted acetophenones were prpared which were highly labeled with 18O at the carbonyl function.The natural abundance 13C NMR spectra of the compounds were recorded and the 18O-isotope-induced shifts of the carbonyl carbon we
