A compound of Formula (I):
is useful in the treatment or prevention of a disease or medical condition mediated through glucokinase (GLK or GK), leading to a decreased glucose threshold for insulin secretion.
Efficient and regioselective N-1 alkylation of 4-chloropyrazolo[3,4-d]pyrimidine
作者:Morten Brændvang、Lise-Lotte Gundersen
DOI:10.1016/j.tetlet.2007.02.116
日期:2007.4
of 4-chloropyrazolo[3,4-d]pyrimidine can be achieved when the heterocycle is reacted with alcohols under Mitsunobu conditions. The 1-alkyl-pyrazolo[3,4-d]pyrimidines formed can be functionalized further according to known methods, to give a variety of 1,4-disubstituted pyrazolo[3,4-d]pyrimidines. The first example of a palladium-catalyzed couplingreaction on a 4-halopyrazolo[3,4-d]pyrimidine is described
当杂环在Mitsunobu条件下与醇反应时,可以实现4-氯吡唑并[3,4- d ]嘧啶的高效和N-1选择性烷基化。形成的1-烷基-吡唑并[3,4- d ]嘧啶可以根据已知方法进一步官能化,得到各种1,4-二取代的吡唑并[3,4- d ]嘧啶。描述了在4-卤代吡唑并[3,4- d ]嘧啶上钯催化的偶联反应的第一个例子。
Heilmittelchemische Studien in der heterocyclischen Reihe. 26. Mitteilung
作者:P. Schmidt、K. Eichenberger、M. Wilhelm、J. Druey
DOI:10.1002/hlca.19590420318
日期:——
Syntheses of pyrazolo [3,4-d]pyrimidines with an amino group in 3- or 4-position are described. For the preparation of the 3-amino derivatives a 4-chloro-5-cyano-pyrimidine is condensed with various hydrazines. The 4-amino-pyrazolo [3,4-d]pyrimidines are obtained by reacting 3-amino-4-carbethoxy-pyrazoles with formamide, chlorinating thc 4-hydroxy-pyrazolo [3,4-d]pyrimidines, and substituting the halogen