Cyclic Phosphine Oxides and Phosphinamides from Di-Grignard Reagents and Phosphonic Dichlorides: Modular Access to Annulated Phospholanes
作者:Aaron M. Gregson、Steven M. Wales、Stephen J. Bailey、Anthony C. Willis、Paul A. Keller
DOI:10.1021/acs.joc.5b01476
日期:2015.10.2
The reaction between 1,4-di-Grignard reagents and phosphonous(III) dichlorides is a classical method for the direct synthesis of phospholanes. Reported here is an extension of this approach to the preparation of value-added, annulated phospholane oxides, achieved through the combination of carbocyclic-fused di-Grignardreagents and readily available phosphonic(V) dichlorides. The procedure is amenable
Arsenous chloride-free synthesis of cyclic tertiary organoarsines from arylarsine oxides and di-Grignard reagents
作者:Aaron M. Gregson、Steven M. Wales、Stephen J. Bailey、Paul A. Keller
DOI:10.1016/j.jorganchem.2015.03.006
日期:2015.6
sparked recent interest in new syntheticroutes to tertiary arsines that avoid hazardous arsenous chloride reagents. However, safer methods for the synthesis of lesser explored arsine heterocycles, especially those containing As–C(sp3) bonds, remain lacking. We demonstrate for the first time that bench stable, less hazardous, arylarsine(III) oxides are effective substitutes for their corresponding chlorides
Orally active PDE4 inhibitors with therapeutic potential
作者:Hiroshi Ochiai、Tazumi Ohtani、Akiharu Ishida、Katuya Kishikawa、Takaaki Obata、Hisao Nakai、Masaaki Toda
DOI:10.1016/j.bmcl.2003.12.018
日期:2004.3
Based on the successful results in the clinical trial of Ariflo(TM), further optimization of the spatial arrangement of the three pharmacophores (carboxylic acid moiety, nitrile moiety and 3-cyclopentyl-4-methoxyphenyl moiety) in the structure of Ariflo 1 was attempted using a bicyclo[3(.)3(.)0]octane template instead of a cyclohexane template. As a result, 2a, 7a and 7b were found to be orally active and were predicted to have an improved therapeutic potential based on evaluation by cross-species and same-species comparisons. Structure-activity relationships (SARs) of these compounds are also discussed. (C) 2003 Elsevier Ltd. All rights reserved.