A biomimetic synthesis of naturally occurring lactams rubrobramide, flavipucine, and isoflavipucine is described. The key step is a regioselective Darzens reaction between isobutyl glyoxal and an α‐bromo‐β‐ketoamide. The construction of the core tricyclic ring system of rubrobramide was achieved by a cascade reaction in a single step from an α,β‐epoxy‐γ‐lactam. Furthermore, the absolute configuration
PYRAZOLO-TETRAHYDRO PYRIDINE DERIVATIVES AS OREXIN RECEPTOR ANTAGONISTS
申请人:Aissaoui Hamed
公开号:US20090099228A1
公开(公告)日:2009-04-16
The invention relates to novel pyrazolo-tetrahydropyridines compounds and their use as orexin receptor antagonists.
这项发明涉及新型吡唑并四氢吡啶化合物及其作为促进睡眠的受体拮抗剂的用途。
ROSUVASTATIN CALCIUM AND PROCESS FOR PRODUCING INTERMEDIATE THEREOF
申请人:API CORPORATION
公开号:US20160347718A1
公开(公告)日:2016-12-01
An object of the present invention is to provide a novel method capable of producing rosuvastatin calcium and intermediates therefor efficiently, inexpensively and with high purity. The present invention provides a method of efficiently producing rosuvastatin calcium and intermediates therefor having a high purity at an industrial scale, without using an extremely low temperature reaction or a special asymmetric catalyst.
The present disclosure provides pyridinone-pyridinyl compounds useful in the treatment of p38 kinase mediated diseases, such as lymphoma and auto-inflammatory disease, having the structure of Formula (I):
wherein R
1
, R
2
, R
3
, R
4
, R
5
, X and Y are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds; and methods for treating p38 kinase mediated diseases using the compound.
Acetoacetylated Meldrum's acid was enantioselectiviely reduced with fermenting baker'syeast to afford the corresponding chiral (S)-alcohol, which could be easily converted to δ-lactone derivatives.