Highly Efficient Narasaka-Heck Cyclizations Mediated by P(3,5-(CF3)2C6H3)3: Facile Access to N-Heterobicyclic Scaffolds
作者:Adele Faulkner、John F. Bower
DOI:10.1002/anie.201107511
日期:2012.2.13
N‐heterobicyclic scaffolds: Highlyefficient palladium‐catalyzed cyclizations of oxime esters with cyclic alkenes were used as a general entry to perhydroindole and related scaffolds. The chemistry is reliant upon the use of P(3,5‐(CF3)2C6H3)3 for the key C(sp3)N bond‐forming process and this facilitates cyclizations with enhanced levels of efficiency across a range of sterically and electronically
N-杂环双环支架:肟酯与环烯烃的高效钯催化环化反应通常用作过氢吲哚和相关支架的入口。化学过程依赖于关键的C(sp 3)N键形成过程使用P(3,5-(CF 3)2 C 6 H 3)3的形成,这有利于环化反应,并提高了整个反应过程的效率。一系列在空间和电子方面不同的基材。
Synthesis of Simple Hydrazones of Carbonyl Compounds by an Exchange Reaction
作者:G. R. Newkome、D. L. Fishel
DOI:10.1021/jo01341a008
日期:1966.3
Synthesis of Isoquinolines via Rh(III)-Catalyzed C–H Activation Using Hydrazone as a New Oxidizing Directing Group
An efficient and mechanistically interesting method for the synthesis of highly substituted isoquinolines by a Rh(III)-catalyzed hydrazone directed ortho C H bond activation and annulation without an external oxidant is described. This reaction is accomplished via a C-C and C-N bond formation along with N-N bond cleavage.
A novel series of metabotropic glutamate receptor 5 negative allosteric modulators based on a 4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine core
A series of potent non-acetylinic negative allosteric modulators of the metabotropic glutamate receptor 5 (mGlu5 NAMs) was developed starting from HTS screening hit 1. Potency was improved via iterative SAR, and physicochemical properties were optimized to deliver orally bioavailable compounds acceptable for in vivo testing. A lead molecule from the series demonstrated dose-dependent activity in the second phase of the rat formalin test from 30 mg/kg, and a preliminary PK/PD relationship was established. (c) 2013 Elsevier Ltd. All rights reserved.
Deprotection of ketone dimethylhydrazones using lipases