6.4. Polyynes 3123 6.5. Using R-Hydroxy Stannanes 3124 6.6. Using the Hurtley Reaction 3124 6.7. Using a Methylenation Reaction 3125 7. Conclusions and Future Prospects 3125 8. Uncommon Abbreviations 3125 9. Acknowledgments 3125 10. Note Added in Proof 3125 11. References 3126 * Authorstowhomcorrespondenceshouldbeaddressed(evano@chimie.uvsq.fr, nicolas.blanchard@uha.fr). † Université de Versailles Saint Quentin en Yvelines. ‡ Université de Haute-Alsace. Chem. Rev. 2008, 108, 3054–3131 3054

Copper-mediated coupling reactions and their applications in natural products and designed biomolecules synthesis.

1,2-Amino Alcohols and Their Heterocyclic Derivatives as Chiral Auxiliaries in Asymmetric Synthesis

A. Lanthanum, Yttrium, and Scandium 2126 B. Hafnium, Zirconium, and Titanium 2126 C. Tantalum, Niobium, and Vanadium 2127 D. Tungsten, Molybdenum, and Chromium 2127 E. Rhenium, Technetium, and Manganese 2128 F. Osmium, Ruthenium, and Iron 2128 1. Osmylation 2128 2. Reactions with Zerovalent Compounds 2131 3. Other Addition Reactions 2133 4. Redox Reactions 2134 5. Cocrystallizations 2134 G. Iridium, Rhodium, and Cobalt 2135 1. Adduct Formation with Vaska-Type Complexes, Ir(CO)Cl(PR3)2 2135

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Reactions of transition metal complexes with fullerenes (c60, c70, etc.) and related materials

Large-scale connectomics requires dense staining of neuronal tissue blocks for electron microscopy (EM). Here we report a large-volume dense en-bloc EM staining protocol that overcomes the staining gradients, which so far substantially limited the reconstructable volumes in three-dimensional (3D) EM. Our protocol provides densely reconstructable tissue blocks from mouse neocortex sized at least 1 mm in diameter. By relaxing the constraints on precise topographic sample targeting, it makes the correlated functional and structural analysis of neuronal circuits realistic. Large-scale dense reconstruction of neuronal circuits (or connectomics) requires methods for large-volume dense en-blocelectron microscopy (EM) staining. Here the authors develop a protocol for staining tissue blocks from mouse neocortex sized at least 1 mm in diameter, enabling correlated functional and structural circuit analyses.

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Large-volume en-bloc staining for electron microscopy-based connectomics.

Improved ligands render terminal olefins good substrates for the osmium-catalyzed asymmetric dihydroxylation (ADH) process, and the amounts of chiral ligand and osmium catalyst required diminish dramatically

New ligands double the scope of the catalytic asymmetric dihydroxylation of olefins

Preclusion of the “second cycle” in the osmium-catalyzed asymmetric dihydroxylation of olefins leads to a superior process

Experimental procedures for the preparation of two classes of derivatives of the cinchona alkaloids dihydroquinine and dihydroquinidine are described. Ligands (DHQ) 2 -PHAL, 1a, and (DHQD) 2 -PHAL, 2a, are conveniently synthesized in good yield by the reaction of the corresponding alkaloid with 1,4-dichlorophthalazine in the presence of K 2 CO 3 and KOH in refluxing toluene. Derivatives DHQ-PHN, 1b, and DHQD-PHN, 2b, are prepared through an Ullmann-type coupling between the 9-O-alkaloid sodium alkoxide and 9-iodophenanthrene in the presence of CuI and pyridine. Crystal structures for derivatives 2a and 2b are also presented. These four alkaloid derivatives serve as highly enantioselective ligands for the osmium tetraoxide catalyzed asymmetric dihydroxylation (AD) of olefins

Yasukazu Ogino

Papers

New ligands double the scope of the catalytic asymmetric dihydroxylation of olefins

Preclusion of the “second cycle” in the osmium-catalyzed asymmetric dihydroxylation of olefins leads to a superior process

Syntheses and crystal structures of the cinchona alkaloid derivatives used as ligands in the osmium-catalyzed asymmetric dihydroxylation of olefins

On the timing of hydrolysis / reoxidation in the osmium-catalyzed asymmetric dihydroxylation of olefins using potassium ferricyanide as the reoxidant

A ligand structure-enantioselectivity relationship for the osmium-catalyzed asymmetric dihydroxylation of olefins