B(C6F5)3-promoted hydrogenations of N-heterocycles with ammonia borane was written by Ding, Fangwei;Zhang, Yiliang;Zhao, Rong;Jiang, Yanqiu;Bao, Robert Li-Yuan;Lin, Kaifeng;Shi, Lei. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2017.Electric Literature of C8H5ClN2 This article mentions the following:
A transition-metal-free method for the B(C6F5)3-promoted hydrogenations of N-heterocycles using ammonia borane under mild reaction conditions was developed. The reaction afforded a broad range of hydrogenated products in moderate to good yields. The enantioselective versions for the corresponding products were also investigated via our approach, showing good feasibility. In the experiment, the researchers used many compounds, for example, 6-Chloroquinoxaline (cas: 5448-43-1Electric Literature of C8H5ClN2).
6-Chloroquinoxaline (cas: 5448-43-1) belongs to quinoxaline derivatives. Condensed heterocycles of quinoxalines have become attractive targets in synthetic and medicinal chemistry due to their significant biological activities. Quinoxaline and its analogues may also be formed by reduction of amino acids substituted 1,5-difluoro-2,4-dinitrobenzene (DFDNB),One study used 2-iodoxybenzoic acid (IBX) as a catalyst in the reaction of benzil with 1,2-diaminobenzene.Electric Literature of C8H5ClN2
Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider