Studies on pyrazines. 35. An improved synthesis of bromopyrazines from hydroxypyrazines
作者:Nobuhiro Sato、Nobuhiko Narita
DOI:10.1002/jhet.5570360334
日期:1999.5
The synthesis of bromopyrazinesfromhydroxypyrazines was successfully effected by the procedure via trimethylsilyloxypyrazines, the sequence of which proceeds under mild conditions and does not require the isolation of intermediate.
2-Bromopyrazines, 2-Cyanopyrazines and their Derivatives
作者:George Karmas、Paul E. Spoerri
DOI:10.1021/ja01591a029
日期:1956.5
Studies on Pyrazines; 38: Acylation of Bromopyrazines and 2-Bromopyridine via Copper-Cocatalytic Stille Reaction
作者:Nobuhiro Sato、Nobuhiko Narita
DOI:10.1055/s-2001-16082
日期:——
Synthesis of acetylpyrazines 3 and propionylpyrazines 5 was achieved by copper-cocatalytic Stille reaction of bromopyrazines 1 with tributyl(1-ethoxyalkenyl)tin and then acidic hydrolysis. The optimal reaction conditions involve the combination of 15 mol% CuI with 5 mol% of PdCl2(Ph3P)2. Similarly, 2-acylpyridines and propionylbenzenes were prepared from the corresponding aryl bromides.
溴吡嗪1与三丁基(1-乙氧基烯基)锡通过铜共催化Stille反应,然后酸水解合成乙酰吡嗪3和丙酰吡嗪5。最佳反应条件为 15 mol% CuI 与 5 mol% PdCl2(Ph3P)2 的组合。类似地,由相应的芳基溴制备2-酰基吡啶和丙酰苯。