1114-51-8Relevant academic research and scientific papers
The Reaction of Saccharin Derivatives with N,N-Diethylprop-1-ynamine: Formation of Cyclobutenyl Saccharinates and of a Spiro-oxete
Abramovitch, Rudolph A.,Ooi, Gino H. C.,Sun, Han-Li,Pierrot, Marcel,Baldy, Andre,Estienne, Jacques
, p. 1583 - 1584 (1984)
Saccharin and two equivalents of N,N-diethylprop-1-ynamine give a cyclobutenyl saccharinate (4) which, on bromination, gives the N-(cyclobutenyl cation)saccharin derivative (8), whose structure was established by X-ray crystallography ; N-methylsaccharin reacts with one equivalent of ynamine to yield the spiro-oxete (9): this represents the second isolation of such a stable oxete from reaction of an ynamine with a carbonyl group.
Cross-coupling reactions of carbamoyl chlorides and Grignard reagents: A new rapid synthesis of tertiary amides
Lemoucheux,Rouden,Lasne
, p. 9997 - 10001 (2000)
Tributyl phosphine or nickel catalysts allow the cross-coupling reaction between N,N-dialkylcarbamoyl chlorides and alkyl or aryl Grignard reagents. This convenient and simple method affords tertiary amides with moderate to excellent yields in short reaction times. (C) 2000 Elsevier Science Ltd.
Carboxylic Acid Deoxyfluorination and One-Pot Amide Bond Formation Using Pentafluoropyridine (PFP)
Brittain, William D. G.,Cobb, Steven L.
supporting information, p. 5793 - 5798 (2021/08/01)
This work describes the application of pentafluoropyridine (PFP), a cheap commercially available reagent, in the deoxyfluorination of carboxylic acids to acyl fluorides. The acyl fluorides can be formed from a range of acids under mild conditions. We also demonstrate that PFP can be utilized in a one-pot amide bond formation via in situ generation of acyl fluorides. This one-pot deoxyfluorination amide bond-forming reaction gives ready access to amides in yields of ≤94%.
Bromination of enamines from tertiary amides using the petasis reagent: A convenient one-pot regioselective route to bromomethyl ketones
Kobeissi, Marwan,Cherry, Khalil,Jomaa, Wissam
supporting information, p. 2955 - 2965 (2013/09/02)
An original one-pot synthesis of bromomethyl ketones is achived using the Petasis reagent (dimethyltitanocene) as a key for enamine generation. Several amides were used to test the limits of the procedure by changing either the alkyl chain R or the amino portion of the starting materials. The enamines generated in situ were allowed to react with bromine at low temperature followed by hydrolysis to yield bromomethyl ketones in excellent yields (85 to 95%). Mechanistic details and optimum conditions for the reaction are briefly discussed. The present approach offers several advantages such as regioselectivity in enamine formation, good yields, mild reaction conditions, and ease of experimentation.
PROCESS FOR PREPARING SECONDARY AMIDES BY CARBONYLATION OF A CORRESPONDING TERTIARY AMINE
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Page/Page column 4, (2010/06/14)
The present invention relates to a process for preparing secondary amides with good selectivity by carbonylating a corresponding tertiary amine with carbon monoxide in a reaction mixture in the presence of a metal catalyst and in the presence of a halogen containing promoter. The metal catalyst comprises palladium. A same or even a much better catalytic activity can be obtained with palladium than with the much more expensive rhodium, especially when the palladium is used in a low concentration. Moreover, also a good selectivity can be achieved.
Niobium pentachloride promoted conversion of carboxylic acids to carboxamides: Synthesis of the 4-aryl-1,2,3,4-tetrahydroisoquinoline alkaloid structures
Nery, Marcelo S.,Ribeiro, Renata P.,Lopes, Claudio C.,Lopes, Rosangela S. C.
, p. 272 - 276 (2007/10/03)
A practical method for the conversion of carboxylic acids to the corresponding carboxamides mediated by niobium pentachloride under mild conditions is described. The synthesis of the 4-aryl-1,2,3,4-tetrahydroisoquinoline alkaloid structures was accomplished via benzylic lithiation of N-methyl-3,4-dimethoxy-2-(4′-methoxybenzyl)benzamide.
Cyclic and acyclic amidines and pharmaceutical compositions containing them for use as progesterone receptor binning agents
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Page 22; 23, (2010/02/10)
Disclosed are cyclic and acyclic amidines, pharmaceutical compositions containing such amidines, and their use in treating or preventing progesterone receptor mediated diseases or conditions, such as osteopenia and osteoporosis.
Cyclic imidate salts in acyclic stereochemistry: Diastereoselective syn-epoxidation of 2-alkyl-4-enamides to epoxyamides
Maligres,Weissman,Upadhyay,Cianciosi,Reamer,Purick,Sager,Rossen,Eng,Askin,Volante,Reider
, p. 3327 - 3338 (2007/10/03)
Reaction of 2-alkyl-4-enamides with I+ and aqueous sodium bicarbonate results in the diastereoselective formation of the corresponding iodohydrins with essentially no iodolactone by-product. The reaction appears to proceed through a cyclic imidate type intermediate. This methodology has been successfully employed for the synthesis of the epoxide intermediate of the orally active HIV-1 protease inhibitor MK-639 (indinavir sulfate).
Aminolysis of N-Acylpyrazoles
Kashima, Choji,Fukuchi, Iwao,Takahashi, Katsumi,Hosomi, Akira
, p. 1407 - 1412 (2007/10/02)
1-Acylpyrazoles reacted with amines having a tiny substituted to afford the corresponding amides.The aminolysis with bulky amines was controlled to be retarded by the steric factors.Due to this steric interaction, the stereoselective aminolysis was observed.This selectivity of aminolysis should increase the utility of pyrazoles as auxiliary compounds in the synthetic loop.
Ruthenium complex-catalyzed coupling of vinyl halides with olefins
Mitsudo, Take-aki,Takagi, Masakazu,Zhang, Shi-Wei,Watanabe, Yoshihisa
, p. 405 - 414 (2007/10/02)
Ruthenium complexes such as Ru(COD)(COT) , catalyze the dehydrohalogenative coupling of vinyl halides with olefins to give the corresponding substituted dienes.Even the sp2-carbon-chloride bond of β-chlorostyrene is activated by ruthenium catalysts.
