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Trifluoromethoxy-substituted anilines undergo hydrogen/lithium permutation ("metalation") with optional site selectivity depending on the N-protective group employed. N-tert-Butoxycarbonyl-2- and -4-(trifluoromethoxy)aniline react with tert-BuLi at the n ...
An efficient synthesis of a fully functionalized tetracyclic fragment (A-B-C-H) I of ecteinascidin 743, contg. a 1,4-bridged 10-membered lactone, is reported. The synthesis is highly convergent and has been carried out on a multigram scale featuring the fo ...
This chapter reviews bicyclic systems containing two fused five-membered rings with one bridgehead nitrogen and two other heteroatoms (nitrogen, oxygen, and sulfur) in each ring. Among the possible structural backbones, 16 have been so far found in the lit ...
Small addition of potassium to V/Ti-oxide catalyst (K:V=0.19), consisting of 3.7 monolayer VOx, increased activity and selectivity in partial oxidation of toluene. In order to elucidate the nature of vanadia species formed on the surface of V/Ti-oxide upon ...
This paper discusses the self-assembly of block copolymers into vesicular morphology. After a brief state of art of the field, a system based on an amphiphilic poly(butadiene)- b-poly(-L-glutamic acid) (PB- b-PGA) diblock copolymer in aqueous solution is d ...
Proteolytically stable peptide architectures are required for the development of long-acting peptide therapeutics. In this work, we found that a phage-selected bicyclic peptide antagonist exhibits an unusually high stability in vivo and subsequently deciph ...
The reaction of hydrated lanthanide hexafluoroacetylacetonates, [Ln(hfa)(3)(H2O)(2)], with 1,4-disubstituted benzenes afforded a new series of one-dimensional coordination polymers Ln(hfa)(3)(Q), where Ln = Eu, Gd, Tb, and Lu and Q = 1,4-diacet ...
Toluene interaction with the catalysts consisting of 0.35, 0.62, 0.75 and 3.7 monolayers (ML) of VOx supported on anatase–titania, containing potassium, was studied by transient response techniques at 523–673 K. FT-Raman spectroscopy under dehydrated condi ...
Partial oxidn. of toluene on V/Ti oxide catalysts is a reaction of industrial interest. In spite of the detailed study of the nature of surface vanadia species, there is an evident lack of the information concerning their reactivity. The present work demon ...
