Synthesis of α-Alkynyl-β,β,β-trifluoroalanine Derivatives by Sonogashira Cross-Coupling Reaction
作者:Grigorii T. Shchetnikov、Maria A. Zotova、Christian Bruneau、Pierre H. Dixneuf、Sergey N. Osipov
DOI:10.1002/ejoc.200901354
日期:2010.3
An efficient route to new α-CF 3 -α-amino acid derivatives bearing an arylalkynyl moiety at the α-carbon atom has been developed. The method is based on palladium-catalyzed cross-coupling of the corresponding α-propargyl (ethynyl) α-amino esters with aryl halides to afford the amino acid derivatives with an internal triple bond that is suitable for further modifications.
New carborane-containing amino acids and their derivatives. Crystal structures of n-protected carboranylalaninates
作者:S. V. Timofeev、V. I. Bregadze、S. N. Osipov、I. D. Titanyuk、P. V. Petrovskii、Z. A. Starikova、I. V. Glukhov、I. P. Beletskaya
DOI:10.1007/s11172-007-0118-9
日期:2007.4
New alanine derivatives containing both the carboranyl and trifluoromethyl groups were synthesized by the reaction of organometallic derivatives of o-carborane with methyl trifluoropyruvate imines. When using the 1R-(−)-menthoxycarbonyl protecting group at the nitrogen atom, one of diastereomers was isolated and characterized. Trifluoromethyl-carboranylalanine methyl esters containing different protecting groups at the nitrogen atom were studied by X-ray diffraction. Both complete and partial deprotection of the amino and carboxy groups was performed.
通过邻碳硼烷的有机金属衍生物与三氟丙酮酸甲酯亚胺的反应,合成了含有碳硼酰基和三氟甲基的新丙氨酸衍生物。当在氮原子上使用 1R-(-)-甲氧羰基保护基团时,分离并表征了其中一种非对映异构体。通过 X 射线衍射研究了氮原子上含有不同保护基团的三氟甲基-硼丙氨酸甲酯。对氨基和羧基进行了完全和部分脱保护。
Arenesulfonylimines of methyl trifluoropyruvate in the cyclocondensation reactions with 1,3-C,N-and-N,N-binucleophiles
作者:V. B. Sokolov、A. Yu. Aksinenko、I. V. Martynov
DOI:10.1007/s11172-007-0352-1
日期:2007.11
Reaction of arenesulfonylimines of methyl trifluoropyruvate with 1,3-C,N-and-N,N-binucleophiles led to a variety of N-sulfonylated fluorine-containing heterocycles, including the fused ones.
N-benzoyl- and arenesulfonylimines of methyl trifluoropyruvate in the cyclocondensation reaction with acetylacetone
作者:V. B. Sokolov、A. Yu. Aksinenko、T. A. Epishina、T. V. Goreva、I. V. Martynov
DOI:10.1007/s11172-013-0063-8
日期:2013.2
A cyclocondensation reaction of N-benzoyl- and arenesulfonylimines of methyl trifluoropyruvate with acetylacetone was studied, which led to the formation of 3-substituted 4-acetyl-5-methyl-2-oxo-3-trifluoromethyl-2,3-dihydrofurans.
2-Trifluoromethyl-substituted 1,2,3,6-tetrahydro-2-pyridyl carboxylates were synthesized in one step by the aza Diels-Alder reactions of methyl trifluoropyruvate sulfonyl- and phosphorylimines with 1,3-dienes.