A novel metal-free organobase-catalyzed regioselective benzoylation of diols and carbohydrates has been developed. Treatment of diol and carbohydrate substrates with 1.1 equiv. of 1-benzoylimidazole and 0.2 equiv. of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in MeCN under mild conditions resulted in highly regioselective benzoylation for the primary hydroxyl group. Importantly, compared to most commonly
A novel method for an efficient regioselective acetylation of carbohydrates and diols in aqueous solution is described. Treatment of substrates with 1-acetylimidazole, and tetramethyl-ammonium hydroxide (TMAH) in water under mild conditions gave highly regioselective acetylation for primary hydroxyl groups. This discovery provides an eco-friendly way for selective acetylation of non-protected glycosides
SUBSTITUTED PYRIDINYL-PYRIMIDINES AND THEIR USE AS MEDICAMENTS
申请人:Dahmann Georg
公开号:US20130023502A1
公开(公告)日:2013-01-24
The invention relates to new substituted pyridinyl-pyrimidines of formula
1
wherein
ring A is a five-membered saturated or unsaturated carbocyclic ring which optionally comprises one, two or three heteroatoms each independently from each other selected from the group N, S and O,
wherein R
1
, R
2
, R
4
, R
3
, R
5
and R
6
are defined as in claim
1
and wherein ring A is further optionally substituted by one or two further substituents and the pharmaceutically acceptable salts, diastereomers, enantiomers, racemates, hydrates and solvates of the aforementioned compounds.
Novel Thiophene Derivatives as Spingosine-1-Phosphate-1 Receptor Agonists
申请人:Bolli Martin
公开号:US20080194670A1
公开(公告)日:2008-08-14
The invention relates to novel thiophene derivatives, their preparation and their use as pharmaceutically active compounds. Said compounds particularly act as immunosuppressive agents.
[EN] QUINAZOLINE DERIVATIVES FOR USE IN THE TREATMENT OF CANCER<br/>[FR] DERIVES DE QUINAZOLINE UTILISES DANS LE TRAITEMENT DU CANCER
申请人:ASTRAZENECA AB
公开号:WO2004004732A1
公开(公告)日:2004-01-15
The invention concerns quinazoline derivatives of Formula (I) wherein each of Z, m, R1, n, R3,Z2 and R14 have any of the meanings defined hereinbefore in the description; processes for their preparation, pharmaceutical compositions containing them and their use in the manufacture of a medicament for use as an anti-invasive or anti-proliferative agent in the containment and/or treatment of solid tumour disease.