G Continuing efforts toward the direct functionalization of aromatic C-H bonds, Nobutaka Fujii and Hiroaki Ohno of Kyoto University described (Chem. Commun. 2009, 3413. DOI: 10.1039/b905586j) a Pd-mediated protocol for…
As alkene metathesis is extended to more and more challenging substrates, improved catalysts and solvents are required. Robert H. 233276-38-5 manufacturer Grubbs of Caltech developed (Org. Lett. tBuBrettPhos Pd G3…
(-)-Kainic Acid (Tomooka), Dasycarpidone (Bennasar), (-)-Cephalotaxine (Ishibashi) and Lysergic Acid (Fujii/Ohno) Intriguing strategies have been developed for the stereocontrolled assembly of complex alkaloid structures. Brian M. Stoltz of Caltech prepared…
The efficient construction of substituted heterocycles is central to medicinal chemistry. Potassium tetrachloroplatinate(II) structure Yoshinori Kondo of Tohoku University reports (J. Am. PMID:23962101 Chem. Soc. 2003, 125, 8082.DOI: 10.1021/ja0342300)that the…
One of the most practical ways to construct enantiomerically-enriched carbocyclic systems is to effect asymmetric transformation of preformed prochiral rings. Choon-Hong Tan of the National University of Singapore observed (Chem.…
(+)-Omaezakianol Tobin J. Marks of Northwestern University observed (J. Am. Chem. Soc. 2009, 131, 263. DOI: 10.1021/ja8072462) high geometric control in the cyclization of 1 to 2. Tristan H. Lambert…
The Sharpless osmium-catalyzed asymmetric dihydroxylation is widely used. Lawrence Que, Jr. of the University of Minnesota designed(Angew. Chem. Int. Ed. 2008, 47, 1887DOI: 10.1002/anie.200705061)a catalyst with the inexpensive Fe that…
E PD. Evidence that siRNAs function as guides, not primers, from the Drosophila and human RNAi pathways. Mol Cell. 2002;ten:537?8. Thomson DW, Bracken CP, Goodall GJ. Experimental strategies for microRNA…
At both the H53A and H53D mutants showed dTMP formation with dramatically decreased activity (Table S2 of reference 17).Benefits and DiscussionWe have crystallized and solved the structures of H53D mutant…
Products such as 3 and 6 are usually prepared by phosphonate condensation. J. S. PMID:23756629 Yadav of the Indian Institute of Technology, Hyderabad found (Tetrahedron Lett. 2008, 49, 4498. DOI:…
Chemexpress