The enantioselective oxidative ring-opening reaction of aziridines with α-nitroacetates has been developed. Good yields and enantioselectivity were observed for the reaction of various aziridines using a novel cinchona alkaloid amide/NiBr2 catalyst. Both enantiomers of products could be obtained by using pseudoenantiomeric chiral catalysts. This process offers an efficientroute for the synthesis of
2-Amino-3-functionalized tetralin derivatives and related glycogen phosphorylase inhibitors
申请人:Sher M. Philip
公开号:US20060111413A1
公开(公告)日:2006-05-25
Novel compounds are provided which are glycogen phosphorylase inhibitors which are useful in treating, preventing or slowing the progression of diseases requiring glycogen phosphorylase inhibitor therapy such as diabetes and related conditions (such as hyperglycemia, impaired glucose tolerance, insulin resistance and hyperinsulinemia), the microvascular complications associated with diabetes (such as retinopathy, neuropathy, nephropathy and delayed wound healing), the macrovascular complications associated with diabetes (cardiovascular diseases such as atherosclerosis, abnormal heart function, myocardial ischemia and stroke), as well as Metabolic Syndrome and its component conditions including hypertension, obesity and dislipidemia (including hypertriglyceridemia, hypercholesterolemia and low HDL), and other maladies such as non-cardiac ischemia, infection and cancer. These novel compounds have the structure
or stereoisomers or prodrugs or pharmaceutically acceptable salts thereof, wherein W, R
1
, R
2
, X, Y and Z are defined herein.
Highly enantioselective desymmetrization of aziridines with TMSNCS has been developed. Good yield and enantioselectivity were observed by using novel chiral imidazoline-phosphoric acid catalysts. The obtained product can be converted to a chiral β-aminothiol and a β-aminosulfonic acid.
Exl Christina, Hoenig Helmut, Renner Gerald, Rogi-Kohlenprath Renate, See+, Tetrahedron: Asymmetry, 3 (1992) N 11, S 1391-1394