The invention is concerned with novel imidazolidinone derivatives of formula (I):
wherein R
1
to R
11
and X are as defined in the description and in the claims, as well as physiologically acceptable salts thereof. These compounds bind to LXR alpha and LXR beta and can be used in pharmaceutical compositions.
Serine as Chiral Educt for the Practical Synthesis of Enantiopure N-Protected β-Hydroxyvaline
作者:James E. Dettwiler、William D. Lubell
DOI:10.1021/jo026260b
日期:2003.1.1
yields. Selective oxidation of diols 3a and 3b was performed using a TEMPO, NaClO(2), NaOCl cocktail in 96% and 93% respective yields. This two-step process effectively furnished multigram amounts of enantiopure N-Boc-beta-hydroxyvaline 1a.
The invention discloses compounds of Formula (I). The compounds of formula (I) are TRPA1 antagonists and are useful as active ingredients of pharmaceutical compositions for the treatment of pain and other conditions ameliorated by the inhibition of TRPA1 receptors.
The invention is concerned with novel imidazolidinone derivatives of formula (I):
wherein R1 to R11 and X are as defined in the description and in the claims, as well as physiologically acceptable salts thereof. These compounds bind to LXR alpha and LXR beta and can be used in pharmaceutical compositions.
New Strategy for the Synthesis of Iminoglycitols from Amino Acids
作者:Sauda Swaleh、Jürgen Liebscher
DOI:10.1021/jo010665z
日期:2002.5.1
A novel strategy for the enantioselective synthesis of polyhydroxypiperidines, which can be considered as iminoglycitols or 2,6-dideoxyazasugars, was developed, alpha-Benzolsulfonylamino esters served as a C2N building block while 2-bromo-3-(bromomethyl)oxazoles and -thiazoles contributed a C3-unit to the final piperidine ring. At first a dihydropyridine ring was established via alkylation and bromine-lithium exchange. The keto group of the resulting 5,6-dihydro[1,3]oxazolo- and 5,6-dihydro[1,3]thiazolo[4,5-c]pyridin-7(4H)-ones was reduced and, after alkylation reactions, the azole ring was cleaved, thus providing heteroatom substituents for the target piperdines. Protected 5-amino-3,4-dihydroxy and 5-amino-3-hydroxy-4-thiohydroxypiperdines were obtained in the talose series while Mitsunobu reaction of the intermiediates provided access to the altrose series.