Provided are a CDK4/6 inhibitor, a pharmaceutically acceptable salt thereof and a polymorph thereof, and the use thereof. In particular, provided are a polymorph of 2-cyclopropyl-N-(5-((4-ethylpiperazin-1-yl)methyl)pyridin-2-yl)-3-isopropyl-3,8-dihydroimidazo[4′,5′,4,5]cyclopentadieno[1,2-d]pyrimidin-5-amine and a pharmaceutically acceptable salt thereof, and the use thereof. In addition, further disclosed are a pharmaceutical composition of the compound and the use thereof.
Development of an Improved Route for the Synthesis of an Abemaciclib Intermediate
作者:Michael P. Carroll、Harold Moloney、Olivia Gowran、Aoibheann O’Connor、Eoin M. Wilson、Michael M. Murray、Mark A. Pietz、Douglas P. Kjell、C. Brad Held、Michael O. Frederick
DOI:10.1021/acs.oprd.9b00347
日期:2019.11.15
A new synthesis for an intermediate of abemaciclib is described. Keys to this route are the use of inexpensive starting materials, biphasic amine alkylation for mild C–N bond formation, anhydrous coupling of a 2-chloropyridine derivative with LiHMDS to avoid a hydroxy impurity, and neutral, fluoride-free conditions to affect desilylation. Scale-up of the optimizedconditions are described on a kilogram
The present disclosure relates to pyridinamine-substituted heterotricyclo compounds, a preparation method thereof, and a use thereof in medicines. Specifically, a compound of formula (I), or a pharmaceutically acceptable salt, stereoisomer, solvate, or prodrug thereof, a preparation method and a use thereof are disclosed, wherein the groups in the formula (I) are as defined in the Description and claims.
The present disclosure relates to pyridinamine-substituted heterotricyclo compounds, a preparation method thereof, and a use thereof in medicines. Specifically, a compound of formula (I), or a pharmaceutically acceptable salt, stereoisomer, solvate, or prodrug thereof, a preparation method and a use thereof are disclosed, wherein the groups in the formula (I) are as defined in the Description and claims.