Hydroboration kinetics. 4. Kinetics and mechanism of the reaction of 9-borabicyclo[3.3.1]nonane with representative haloalkenes. The effect of halogen substitution upon the rate of hydroboration
Catalytic enantioselective method of consecutive Suzuki–Miyaura alkylations of gem-chloro(iodo)alkanes to form two C–C bonds in one pot transformation is described.
the development of new efficient and selective methods for their synthesis is an important goal in organic chemistry. Here, we present the first Suzuki cross-coupling reaction which utilizes dihalo compounds for the preparation of secondary alkyl fluorides. Namely, an unprecedented use of simple 1-halo-1-fluoroalkanes as electrophiles in C(sp(3))-C(sp(3)) and C(sp(3))-C(sp(2)) cross-couplings allows
The novel benzopyran class of selective cyclooxygenase-2 inhibitors. Part 2: The second clinical candidate having a shorter and favorable human half-life
作者:Jane L. Wang、David Limburg、Matthew J. Graneto、John Springer、Joseph Rogier Bruce Hamper、Subo Liao、Jennifer L. Pawlitz、Ravi G. Kurumbail、Timothy Maziasz、John J. Talley、James R. Kiefer、Jeffery Carter
DOI:10.1016/j.bmcl.2010.07.054
日期:2010.12
In this Letter, we provide the structure-activity relationships, optimization of design, testing criteria, and human half-life data for a series of selective COX-2 inhibitors. During the course of our structure-based drug design efforts, we discovered two distinct binding modes within the COX-2 active site for differently substituted members of this class. The challenge of a undesirably long human half-life for the first clinical candidate 1 t(1/2) = 360 h was addressed by multiple strategies, leading to the discovery of 29b-(S) (SC-75416) with t(1/2) = 34 h. (C) 2010 Elsevier Ltd. All rights reserved.