申请人:JNC CORPORATION
公开号:US09346767B2
公开(公告)日:2016-05-24
Described include (1) a substituted pyrazine compound of general formula (VIII):
and (2) a process for producing the substituted pyrazine compound of general formula (VIII), where R1 is hydrogen, a halogen, a substituted or unsubstituted hydrocarbon group, or a substituted or unsubstituted heterocyclic group, and R4 is a protecting group. The process comprises (1) the step of reacting 2-amino-3,5-dibromo-6-chloropyrazine with R1MgX and ZnCl2 in the presence of a palladium catalyst to produce a compound of general formula (V); (2) the step of reacting the compound of general formula (V) with a compound of general formula (VI) to produce a compound of general formula (VII); and (3) the step of reacting the compound of formula (VII) with tributyl(vinyl)tin in the presence or a palladium catalyst to given the compound of general formula (VIII).
描述包括(1)一种通式(VIII)的取代吡嗪化合物,和(2)一种制备通式(VIII)的取代吡嗪化合物的方法,其中R1为氢、卤素、取代或未取代的碳氢基团或取代或未取代的杂环基团,R4为保护基。该方法包括(1)将2-氨基-3,5-二溴-6-氯吡嗪与R1MgX和ZnCl2在钯催化剂的存在下反应,以产生通式(V)的化合物;(2)将通式(V)的化合物与通式(VI)的化合物反应,以产生通式(VII)的化合物;和(3)在钯催化剂的存在下,将通式(VII)的化合物与三丁基(乙烯基)锡反应,得到通式(VIII)的化合物。