Reference of 723286-68-8, These common heterocyclic compound, 723286-68-8, name is Ethyl 5,6,7,8-Tetrahydro-1,2,4-triazolo[4,3-a]pyrazine-3-carboxylate, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
The title compound was prepared following general procedure B from Intermediate-1A, except ethyl 5,6,7,8-tetrahydro-[l,2,4]triazolo[4,3-a]pyrazine-3-carboxylate (4 equiv.) was the amine reactant, and the reaction was run in THF. The workup was carried out in dichloromethane and brine. The crude material was purified via silica gel chromatography utilizing a 0-10% methanol/dichloromethane gradient to deliver the desired Intermediate-9 (42 mg, 37% yield) as a solid. ‘H-NMR (400 MHz, CDC13) delta 8.47 (d, IH), 8.35 (d, IH), 7.40 (s, IH), 7.21 -7.16 (m, IH), 7.01 (t, IH), 6.95 (t, IH), 6.84 (t, IH), 6.65 (d, IH), 5.98 (s, 2H), 5.35 (s, 2H), 4.59 (t, 2H), 4.48 (q, 2H), 4.30 (t, 2H), 1.44 (t, 3H).
Statistics shows that Ethyl 5,6,7,8-Tetrahydro-1,2,4-triazolo[4,3-a]pyrazine-3-carboxylate is playing an increasingly important role. we look forward to future research findings about 723286-68-8.
Reference:
Patent; IRONWOOD PHARMACEUTICALS, INC.; BARDEN, Timothy Claude; SHEPPECK, James Edward; RENNIE, Glen Robert; RENHOWE, Paul Allan; PERL, Nicholas; NAKAI, Takashi; MERMERIAN, Ara; LEE, Thomas Wai-Ho; JUNG, Joon; JIA, James; IYER, Karthik; IYENGAR, Rajesh R.; IM, G-Yoon Jamie; (293 pag.)WO2016/44447; (2016); A1;,
Pyrazine – Wikipedia,
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