已经开发了一种新的合成喹唑啉的有效方法。因此,将N- [2-(1-(叠氮基烷基)苯基]甲酰胺1与POCl 3脱水,得到相应的2-(1-叠氮基烷基)苯基异氰酸酯2,然后将其在DMF中于0H下用NaH处理,得到喹唑啉。6通过环化1-(2-异氰基苯基)亚烷基亚胺中间体4得到满意的收率。该方法可用于喹唑啉的7-氮杂类似物的合成,即吡啶并[3,4- d ]嘧啶9。
“On‐Water” Palladium‐Catalyzed Tandem Cyclization Reaction for the Synthesis of Biologically Relevant 4‐Arylquinazolines
作者:Shuo Yuan、Bin Yu、Hong‐Min Liu
DOI:10.1002/chem.201903464
日期:2019.10.11
The quinazoline scaffold is prevalent in pharmaceutically relevant molecules that show diverse biological activities. Herein, we report an efficient "on-water" palladium-catalyzed tandem cyclization reaction from commercially available arylboronic acids and benzonitriles that enable the rapid access to 4-arylquinazoline scaffolds in good to excellent yields (45 examples, up to 98 % yield). This protocol
A novel amine derivative expressed by general formula (1)
(in the formula: G
1
, G
2
, and G
3
are the same or different and represent CH or a nitrogen atom; R
1
represents a chlorine atom, an optionally-substituted C
3-8
cycloalkyl group, or the like; R
2
represents —COOR
5
(in the formula, R
5
represents a hydrogen atom or a carboxyl protective group), or the like; R
3
represents a hydrogen atom, or the like; and R
4
represents an optionally-substituted condensed bicyclic hydrocarbon group, an optionally-substituted bicyclic heterocyclic group, or the like), or a salt thereof is useful in procedures such as the treatment or prevention of conditions related to excessive keratinocyte proliferation.