Establishment of an Efficient Synthetic Route to 3,4:3’,4’-Bis(3,6,9-trioxaundecane-1,11-dioxy)benzil
摘要:
3,4:3',4'-Bis(3,6,9-trioxaundecane- 1, 11 -dioxy)benzil (1) [bis(crown ether)benzil] was prepared by three different routes in which the third route C, including the method of Sonogashira-coupling, was the most efficient method with the overall yield of 50%. Further, the method of synthesizing the novel compound 3,4:3',4'-bis[3,4-(3,6,9-trioxaundecane- 1, 11 -dioxy)]benzoin (6) [bis(crown ether)benzoin], which has not yet been prepared appropriately, was also provided.
Facile Synthesis of Bis(crown ether)benzils: Prospective Building Blocks for Metal Ion Sensors
摘要:
A new facile synthetic route to benzils containing fragments of 12-crown-4, 15-crown-5, and 18-crown-6 by oxidation of corresponding stilbenes was developed. The first representative of a new family of fluorescent sensors was obtained by reaction of bis(15-crown-5)benzil with o-phenylenediamine. The latter exhibits great fluorescence enhancement upon association with K+ and Rb+ compared to Na+ and Cs+.