Solid acid-catalyzed domino cyclization reaction: regio- and diastereoselective synthesis of pyrido[2,3-<i>d</i>]pyrimidine derivatives bearing three contiguous stereocenters
作者:Furen Zhang、Chunmei Li、Xuezheng Liang
DOI:10.1039/c7gc03812g
日期:——
An efficient and green domino approach for the synthesis of 5,6,7,8-tetrahydropyrido[2,3-d]pyrimidin-4(3H)-one derivatives using a recoverable carbonaceous material as a catalyst has been established. The new domino reaction was conducted by reacting the readily available and inexpensive starting materials 2,6-diaminopyrimidin-4(3H)-one, nitroolefin and aldehyde in water. A total of 24 examples were
建立了一种有效的绿色多米诺骨牌方法,以可回收的碳质材料为催化剂,合成5,6,7,8-四氢吡啶并[2,3- d ]嘧啶-4(3 H)-one衍生物。新的多米诺骨牌反应是通过使容易获得且廉价的原料2,6-二氨基嘧啶-4(3 H)-一,硝基烯烃和乙醛在水中。总共检查了24个实例,结果显示出较宽的底物范围和高产量。含碳材料催化剂可以重复使用至少5次,而不会明显失活。所提出的机理已经解释了反应过程以及由此产生的高区域选择性和非对映选择性。本发明的绿色策略显示出有吸引力的特性,例如使用水作为绿色介质,使用廉价且可回收的固体酸催化剂,并且具有简单的后处理/纯化方法,而不会产生任何废品或使用任何金属促进剂。