The present invention relates to novel arginase inhibitors of formula (I). These novel compounds are useful in the treatment of diseases that are associated with arginase activity, such as asthma, allergic rhinitis and COPD (chronic obstructive pulmonary disease).
The reaction of various coumarins with cyanoacetamide derivatives under basic conditions (sodium ethoxide, piperidine or 2,2,6,6-tetramethylpiperidine), proceeds via an interesting process which involves skeletal rearrangement of the coumarin, a Michael addition and two cyclizations to afford 5-amino-1,10b-dihydro-2H-chromeno[3,4-c]pyridine-2,4(3H)-diones. The same reaction in the presence of N,N¢-ethane-1
各种香豆素与氰基乙酰胺衍生物在碱性条件下(乙醇钠,哌啶或2,2,6,6-四甲基哌啶)的反应是通过一个有趣的过程进行的,该过程涉及香豆素的骨架重排,迈克尔加成和两个环化反应得到5 -氨基-1,10b-二氢-2 H-苯并[3,4- c ]吡啶-2,4(3 H)-二酮。在N,N ¢-乙烷-1,2-二基双(2-氰基乙酰胺)存在下的相同反应,得到相应的单和双5-氨基-1,10b-二氢-2 H -chromeno [3,4- c ]吡啶-2,4(3 H)-二酮。 香豆素-迈克尔加成-杂环-环化-chromenes
Cyanoacetic acid derivatives are the starting materials for a plethora of multicomponent reaction (MCR) scaffolds. Here we describe valuable general protocols for the synthesis of arrays of 2-aminothiophene-3-carboxamides from cyanoacetamides, aldehydes or ketones, and sulfur via a Gewald-3CR variation. In many cases the reactions involve a very convenient work up by simple precipitation in water and filtration