Preparation of Novel 2,3,8-Trisubstituted Pyrido[3,4-b]pyrazines and Pyrido[2,3-b]pyrazines
作者:Pascal Marchand、Maud Antoine、Michael Czech、Matthias Gerlach、Eckhard Günther、Tilmann Schuster
DOI:10.1055/s-0030-1259429
日期:2011.3
A four-step synthesis of 8-bromo-2,3-disubstituted pyrido[3,4-b]pyrazines and a six-step synthesis of 8-amino-2,3-disubstituted pyrido[3,4-b]pyrazines have been developed. A particularly valuable feature of this synthetic route is the possibility to build 2,3-disubstituted pyrido[3,4-b]pyrazines with a large variety of substituents in position 8 (aniline, amide, urea, thiourea). Our protocol was extended
八步合成8-溴-2,3-二取代的吡啶并[3,4- b ]吡嗪和六步合成8-氨基-2,3-二取代的吡啶并[3,4- b ]吡嗪已开发。该合成路线的特别有价值的特征是可以构建在位置8(苯胺,酰胺,尿素,硫脲)具有多种取代基的2,3-二取代的吡啶并[3,4- b ]吡嗪。我们的协议扩展到2,3,8-三取代吡啶并[2,3- b ]吡嗪的合成。 吡啶并[3,4- b ]吡嗪-吡啶并[2,3- b ]吡嗪-二氨基吡啶-尿素-硫脲-酰胺