142950-82-1Relevant articles and documents
A new type of L-Tertiary leucine-derived ligand: Synthesis and application in Cu(II)-catalyzed asymmetric Henry reactions
Cai, Zedong,Lan, Ting,Ma, Pengfei,Zhang, Jingfang,Yang, Qingqing,He, Wei
, (2019/08/08)
A new series of Schiff bases derived from amino acids were developed as chiral ligands for Cu(II)-catalyzed asymmetric Henry reactions. The optimum ligand 7d exhibited outstanding catalytic efficiency in the Cu(II)-catalyzed asymmetric Henry additions of four nitroalkanes to different kinds of aldehydes to produce 76 desired adducts in high yields (up to 96%) with excellent enantioselectivities, up to 99% enantiomeric excess (ee).
DPP-IV INHIBITORS
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Page/Page column 43, (2010/02/14)
The invention relates to compounds of formula (I), Z-C(R1R 2)-C(R3NH2)-C(R4R5)-X-N(R 6R7), wherein Z, R1-7 and X have the meaning as cited in the description and the claims. Said compounds are useful as DPP-lV inhibitors. The invention also relates to the
Dehydrogenation of cyclic tertiary amines with neighbouring of enantiomeric nucleophiles
M?hrle, Hans,Berkenkemper, Thomas
, p. 435 - 443 (2007/10/03)
For stereochemical investigation of their dehydrogenation, the enantiomers of the aminoalcohols 1, 2, and 3 were prepared from optically active sources, while the enantiomers of the diamines 8 and 9 were available by resolution of the racemates. The pure antipodes of 1, 2, and 3 reacted with mercury(II)-EDTA by a twofold dehydrogenation via intermediate participation of the neighbouring alcoholic group to the optically active lactams 5, 6, and 7 under complete retention of configuration. In the same manner the diamines 8 and 9 generated by four electron withdrawal the cycloamidines 10 and 11.
Practical one-step synthesis of Koga's chiral bases
Curthbertson,O'Brien,Towers
, p. 693 - 695 (2007/10/03)
A simple, efficient and practical method for the preparation of Koga's chiral bases is described. The method involves attack of an amine on a styrene oxide-derived aziridinium ion and has allowed the synthesis of novel diamines which cannot be prepared us
Stereoselective reactions. XXII. Design and synthesis of chiral chelated lithium amides for enantioselective reactions
Shirai,Aoki,Sato,Kim,Murakata,Yasukata,Koga
, p. 690 - 693 (2007/10/02)
Chiral chelated lithium amides ((R))-1a-g) were designed and synthesized in optically pure forms starting from (R)-phenylglycine.
Benzoxazolamines and Benzothiazolamines: Potent, Enantioselective Inhibitors of Leukotriene Biosynthesis with a Novel Mechanism of Action
Lazer, Edward S.,Miao, Clara K.,Wong, Hin-Chor,Sorcek, Ronald,Spero, Denice M.,et al.
, p. 913 - 923 (2007/10/02)
A series of benzoxazolamine and benzothiazolamine analogs that inhibit leukotriene (LT) biosynthesis are described.The initial lead, (S)-N-(benzothiazol-2-yl)phenylalanine ethyl ester (5a), was discovered in a screening program for inhibition of Ca-ionophore-A23187-induced LTB4 release in human polymorphonuclear leukocytes (IC50 0.23 μM).Through structural modification, it was determined that hydrophobic substituents in the 5-position and replacement of the phenyl ring of phenylalanine with a cyclohexyl group greatly enhance potency.Several ester bioisosteres that retain potency and enantiomeric selectivity are described.Lead optimization culminated in (S)-N--5-methyl-2-benzoxazolamine (43b), IC50 0.001 μM.The compounds described are not inhibitors of 5-lipoxygenase but, rather, act at the level of arachidonic acid release.