A convenient procedure for the synthesis of supramolecules bearing carotenoids and fullerene C60 is reported. The amphipathic nature and the high yield of charge separation of these compounds make them candidates in the formation of transmembrane charge gradients. Introduction Photochemical and photophysical studies of fullerene C60 (buckminsterfullerene) have shown that C60 is a good electron-...

The total synthesis of the endogenous inflammation resolving eicosanoid resolvin D2 (1) is described. The key steps involved a Wittig reaction between aldehyde 5 and the ylide derived from phosphonium salt 6 to give enyne 17 and condensation of the same ylide with aldehyde 7 to afford enyne 11. Desilylation of 11 followed by hydrozirconation and iodination gave the vinyl iodide 4 and Sonogashir...

The title compound, C(19)H(21)N(3)O(3)S, was synthesized via an aza-Wittig reaction of a functionalized imino-phospho-rane with phenyl isocyanate under mild conditions. In the mol-ecule, the fused thienopyrimidine ring system makes a dihedral angle of 66.30 (11)° with the phenyl ring. An intra-molecular C-H⋯O hydrogen bond occurs. The terminal -OCH(2)CH(3) group is disordered over two sites wit...

Female pheromone glands of the leafroller Argyrotaenia sphaleropa were analyzed. Two acetates were identified as (11Z,13)-tetradecadien-1-yl acetate and (11Z)-tetradecen-1-yl acetate by comparison with synthesized references. The (11Z,13)-tetradecadien-1-yl acetate and the aldehyde (11Z,13)-tetradecadienal were synthesized via a Wittig reaction. A field-trapping test showed that a lure consisti...

Steroid esters of cynnamic acid derivatives have been synthesized by a heterogeneous Wittig reaction under sonochemical conditions from the corresponding triphenylphosphonium bromides and unprotected phenolic aldehyds using K2CO3 as a base. 5 beta-Cholan-3 alpha, 7 alpha, 12 alpha, 24-E-ferulate (11') exhibited a marked inhibitory effect on influenza virus A. The synthetic 3 alpha, 24-E-diferul...

Recently, Wittig and co-workers have published rate coefficients kðEÞ for the unimolecular decomposition of photoinitiated NO2 close to the dissociation threshold [Chem. Phys. Lett. 358 (2002) 71]. They found out that kðEÞ for low angular momentum J exhibits a strong increase within 25 cm 1 of the reaction threshold. The authors emphasize that their experimental results are surprising and canno...

The title compound, C17H18O5, was synthesized by a base-free catalytic Wittig reaction. The mol-ecule consists of a diethyl itaconate unit, which is connected via the C=C double bond to a benzo-furan moiety. The benzo-furan ring system (r.m.s. deviation = 0.007 Å) forms dihedral angles of 79.58 (4) and 12.12 (10)° with the mean planes through the cis and trans eth-oxy-carbonyl groups, respectiv...

Novel 2'(β)-methyl-5'-deoxyapiose purine phosphonic acid analogues were designed and synthesized from 2-propanone1,3-diacetate. Condensation successfully proceeded from a glycosyl donor 9 under Vorbrüggen conditions. Condensation of aldehyde 14 with Wittig reagent [(diethoxyphosphinyl)methylidene] triphenylphosphorane gave the desired nucleoside phosphonate analogues 15. Ammonolysis and hydroly...