| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 1-(2-(phenylethynyl)phenyl)pentan-1-ol | 383909-29-3 | C19H20O | 264.367 |
| 2-苯基乙炔基苯甲醛 | o-(phenylethynyl)benzaldehyde | 59046-72-9 | C15H10O | 206.244 |
Spirocyclic frameworks could enhance the drug‐like properties of planar bioactive molecules by increasing their three‐dimensionality, making the development of synthetic methodology and bioactivity assays for spiro compounds highly attractive. This work reported the silver‐catalyzed tandem cycloisomerization/Povarov reaction between β‐alkynyl ketones and hexahydro‐1,3,5‐triazines, access to spiro[isochromene‐1,4’‐quinoline]. This synthetic protocol was characterized by remarkable efficiency, low catalyst‐loading and high diastereoselectivity. Moreover, the spirocyclic quinolines exhibited good cytotoxicity in U937 cells by activating the Notch‐signaling pathway exclusively.
A synthetic protocol for construction of 3‐benzoxepin skeleton through a silver‐catalyzed annulation/nucleophilic/ring‐expansion reaction of 2‐alkynylacetophenones with diazomethylphosphonates is described. This protocol provided a series of 1‐phosphonate‐3‐benzoxepin analogs in yields of 39%–95%. The resulting benzoxepins featuring halogen and phosphonate could be further transformed into other derivatives.