Sequential Protocol for C(sp3)–H Carboxylation with CO2: Transition-Metal-Catalyzed Benzylic C–H Silylation and Fluoride-Mediated Carboxylation
摘要:
One of the most challenging transformations in current organic chemistry is the catalytic carboxylation of a C(sp(3))-H bond using CO2 gas, an inexpensive and ubiquitous Cl source. A sequential protocol for C(sp(3))-H carboxylation by employing a nitrogen-directed, metal-assisted, C-H activation/catalytic silylation reaction in conjunction with fluoride-mediated carboxylation with CO2 was established. The carboxylation proceeded only at the benzylic C(sp(3))-Si bond, not at the aromatic C(sp(2))-Si, which is advantageous for further manipulations of the products.
THIAZOLIDINE DERIVATIVES AS OREXIN RECEPTOR ANTAGONISTS
申请人:Aissaoui Hamed
公开号:US20100113531A1
公开(公告)日:2010-05-06
The invention relates to novel thiazolidine derivatives of the formula (I) wherein A and R
1
are as described in the description and their use as medicaments, especially as orexin receptor antagonists.
[EN] 2-AZA-BICYCLO[2.2.1]HEPTANE DERIVATIVES<br/>[FR] DÉRIVÉS DE 2-AZA-BICYCLO[2.2.1]HEPTANE
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2009104155A1
公开(公告)日:2009-08-27
The invention relates to novel 2-aza-bicyclo[2.2.1]heptane derivatives of formula (I), wherein A, B, n and R1 are as described in the description, and to the use of such compounds, or of pharmaceutically acceptable salts of such compounds, as medicaments, especially as orexin receptor antagonists.
2-AMINOBENZOXAZOLE CARBOXAMIDES AS 5HT3 MODULATORS
申请人:Yang Zhicai
公开号:US20080255114A1
公开(公告)日:2008-10-16
Compounds of formulae I, II and III:
are disclosed as 5-HT3 inhibitors. The compounds are useful in treating CINV, IBS-D and other diseases and conditions.
was applied for the synthesis of benzoxazoles via a C(aryl)−OH functionalization of catechol derivatives and amines in ethanol at room temperature. In the next step, aminoacids have been applied as nontoxic and cheap alternatives for amines. The obtained products were similar with the regular amines case. This is the first report about the application of aminoacids as alternatives for primary amines