Pacifigorgianes 1 are a small group of sesquiterpenes, containing bicyclo[4.3.0]nonane moiety, found to be present in both marine and terrestrial sources. The first member of this group, ichthyotoxic (+)pacifigorgiol 2 was isolated in 1982 by the research groups of Fenical and Clardy 1 from the pacific gorgonian coral Pacifigorgia cf. adamssi. Later in 1986, Simpa and coworkers 2 reported the i...

The Diels-Alder reaction between diene-modified oligonucleotides and maleimide-derivatized peptides afforded peptide-oligonucleotide conjugates with high purity and yield. Synthesis of the reagents was easily accomplished by on-column derivatization of the corresponding peptides and oligonucleotides. The cycloaddition reaction was carried out in mild conditions, in aqueous solution at 37 degree...

Four edible mushrooms, Panellus serotinus, Lepista nuda, Tricholoma matsutake and Naematoloma sublateritium, have been investigated chemically. Two new sterols, 5alpha,9alpha-epidioxy-(22E)-ergosta-7,22-diene-3beta,6alpha-diol (1) and 5alpha,9alpha-epidioxy-(22E)-ergosta-7,22-diene-3beta,6beta-diol (2), have been isolated from Panellus serotinus. Compound 2 was also isolated from Lepista nuda. ...

The title compound, [Sn(2)(C(4)H(9))(2)(C(12)H(20))(2)], has two 1-stannacyclo-penta-diene skeletons related by inversion symmetry located at the mid-point of the Sn-Sn bond [2.7682 (2) Å]. Thus, the asymmetric unit comprises one half-mol-ecule. The planarity of the stannacyclo-penta-diene ring is illustrated by the dihedral angle of 0.3 (1)°, defined by the C(4) and C-Sn-C planes. To avoid ste...

Acenes such as pentacene have been widely studied over the last decade because of their highly promising potential as organic semiconductors, and have found use in devices such as photovoltaics and field-effect transistors. Nonetheless, the locked s-cis diene units within acenes are an Achilles' heal, in that many acenes readily dimerize and react with oxygen. As a possible alternative, we have...

In the title compound, [Fe(C(12)H(16)O(4))(CO)(3)], the diene moiety of the mol-ecule is virtually planar, with a C-C-C-C torsion angle of -1.4 (2)°. The six-membered ring exhibits a boat conformation, with torsion angles of 46.2 (2) and 46.5 (3)° for a double-bond and the two attached Csp(3) atoms. The Fe atom is coordinated to all four of the diene C atoms, with bond lengths between 2.041 (2)...

In the title complex, [Rh(C(6)H(16)P(2))(2)][RhCl(2)(C(8)H(12))], the asymmetric unit contains two [Rh(dmpe)(2)] [dmpe = 1,2-bis-(dimethyl-phosphino)ethane] half-cations, lying on inversion centers, and an [RhCl(2)(cod)](-) (cod = 1,5-cyclo-octa-diene) anion, wherein Rh is coordinated by two chloride ligands and two olefinic π-bonds of the cyclo-octa-diene ligand. The Rh atoms in the cations an...

In the title compound, [Fe(C(5)H(5))(C(14)H(10)NO(3))], one cyclo-penta-diene ring is substituted and one is unsubstituted. The two rings are almost parallel and are eclipsed and ordered. The conjugated substituent is slightly twisted with respect to the cyclo-penta-diene ring. The crystal structure contains four inter-molecular C-H⋯O hydrogen-bonds in the range 3.324 (3)-3.539 (3) Å and one π(...