A Practical Synthesis of the PDE4 Inhibitor, KW-4490
摘要:
A practical and scalable synthesis of a PDE4 inhibitor KW-4490 (1) was developed. This improved synthesis features the construction of the 1-arylcyclohexene (9) by the Diels-Alder reaction followed by a newly established Bronsted acid-promoted hydrocyanation. Subsequent crystallization-induced dynamic resolution enabled the high-yield production of the desired cis-isomer (cis-8). The synthesis was achieved in seven steps in 37% overall yield.
UREA-SUBSTITUTED AROMATIC RING-LINKED DIOXANE-QUINAZOLINE AND -LINKED DIOXANE-QUINOLINE COMPOUNDS, PREPARATION METHOD THEREFOR AND USE THEREOF
申请人:Beijing Scitech-MQ Pharmaceuticals Limited
公开号:EP3590941A1
公开(公告)日:2020-01-08
The present invention relates to a urea-substituted aromatic ring-linked dioxane-quinazoline compound of Formula (I) and a urea-substituted aromatic ring-linked dioxane-quinoline, or a pharmaceutically acceptable salt thereof or a hydrate thereof. Also provided are the preparation of the compound as shown in Formula (I) and the pharmaceutically acceptable salt thereof and the use thereof as a drug. The drug is used as an inhibitor of tyrosine kinases (e.g., VEGFR-2, C-RAF, B-RAF) for treating tyrosine kinase-related diseases.
Novel derivatives of 3,4,5-trimethoxy cinnamoyl piperazine, their salts,
申请人:Delalande S.A.
公开号:US04368199A1
公开(公告)日:1983-01-11
1-substituted-4-(3,4,5-trimethoxy) cinnamoyl piperazine compounds are disclosed. The compounds exhibit a substantial activity of stimulating cardiac contractile force, without affecting the cardiac frequency, and they also exhibit coronary vasodilatory and hypotensive effects.