Ceric ammonium nitrate catalyzed efficient and chemoselective method for protection and deprotection of 4-oxo-4<i style="">H</i>-1-benzopyran-3-carbaldehydes

2409-2411A chemoselective, solvent-free, mild and efficient method for the synthesis of acylals and their deprotection to 4-oxo-4H-1-benzopyran-3-carbaldehydes catalyzed by ceric ammonium nitrate (CAN) are carried out in good yields and all compounds 2a-h are characterized by IR, 1H NMR and 13C NMR spectral data

Selective regeneration of carbonyl compounds from aldoximes and ketoximes, catalyzed by FeCl₃ and SeO₂

1302-1304An oxidative deblocking procedure of aldoximes using FeCl3 and ketoximes using SeO2 in aprotic solvent is reported. Reaction yields are competitive as compared to previous methods. Reactions are easy to work and conditions are mild. Some important features of FeCl3 are mentioned

Synthesis of newer selenadiazoles and thiadiazoles from their chroman-4-one precursors

189-191A newer series of 13 compounds viz. 2-aryl-3,4-dihydrobenzopyrano [3,4-d]-1, 2, 3-selenadiazoles 3 and 2-aryl-3,4-dihydrobenzopyrano [3,4-d]-1, 2, 3-thiadiazoles 4 have been synthesized from their chroman-4-one precursors

Crowning of dibenzosilole with a naphthalenediimide functional group to prepare an electron acceptor for organic solar cells

A novel, solution-processable non-fullerene electron acceptor 9,9′-(5,5-dioctyl-5H-dibenzo [b,d]silole-3,7-diyl)bis(2,7-dioctyl-4-(octylamino)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone) (B3) based on dibenzosilole and naphthalenediimide building blocks was designed, synthesized, characterized and successfully used in a bulk-heterojunction organic solar cell. B3 displayed excellent solubility, thermal stability and acquired electron energy levels matching with those of archetypal donor polymer poly(3-hexylthiophene). Solution-processable bulk-heterojunction devices afforded 1.16% power conversion efficiency with a high fill factor of 53%. B3 is the first example in the literature using this design principle, where mild donor units at the peripheries of end-capped naphthalenediimide units tune solubility and optical energy levels simultaneously