110958-19-5Relevant articles and documents
SOLID FORMS OF FASORACETAM
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Paragraph 00741; 00742, (2019/08/08)
The disclosure is directed to cocrystals of fasoracetam, including R-fasoracetam, and various coformers. Crystalline materials comprising fasoracetam, including R-fasoracetam, are also provided. The disclosure further includes pharmaceutical compositions and methods of treatment of the cocrystals and crystalline materials of the disclosure.
Protecting-Group-Free Amidation of Amino Acids using Lewis Acid Catalysts
Sabatini, Marco T.,Karaluka, Valerija,Lanigan, Rachel M.,Boulton, Lee T.,Badland, Matthew,Sheppard, Tom D.
, p. 7033 - 7043 (2018/05/04)
Amidation of unprotected amino acids has been investigated using a variety of ‘classical“ coupling reagents, stoichiometric or catalytic group(IV) metal salts, and boron Lewis acids. The scope of the reaction was explored through the attempted synthesis of amides derived from twenty natural, and several unnatural, amino acids, as well as a wide selection of primary and secondary amines. The study also examines the synthesis of medicinally relevant compounds, and the scalability of this direct amidation approach. Finally, we provide insight into the chemoselectivity observed in these reactions.
Synthesis of chiral diamines using novel 2-trichloromethyloxazolidin-4-one precursors derived from 5-oxo-proline and proline
Amedjkouh, Mohamed,Ahlberg, Per
, p. 2229 - 2234 (2007/10/03)
Efficient syntheses of chiral vicinal diamines derived from (S)-oxo-proline and (S)-proline are described. The novel diastereomerically pure precursor (2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo-[3.3.0]-octan-4,8-dione 3 and its enantiomer are readily available by reaction of the inexpensive enantiomers of 5-oxo-proline with chloral. Compound 3 reacts with primary and secondary amines to afford the 5-oxo-prolylamides 4 in quantitative yield. In contrast, the (S)-proline-derived precursor (2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo[3.3.0]octan-4-one 6 gave (S)-N-formylprolylamides 9 and/or (S)-prolylamides 8 depending on the reaction conditions. Upon reduction with LiAlH4, amides 4 and 9 afforded the proline-derived (S)-2-(alkylaminomethyl)pyrrolidines 1 and (S)-N-methyl-2-(alkylaminomethyl)-pyrrolidines 5 in 70-90% yields.
Pyroglutamide derivatives
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, (2008/06/13)
Pyroglutamide derivatives have been found to be useful as nootropic agents for administration to humans and animals.