Pyrophtalones VII. Synthèse et activité anti-inflammatoire de (pyridinyl-4)-2 indanediones-1,3 substituées sur le noyau benzénique et/ou sur l'hétérocycle
Pyrophtalones VII. Synthèse et activité anti-inflammatoire de (pyridinyl-4)-2 indanediones-1,3 substituées sur le noyau benzénique et/ou sur l'hétérocycle
InCl<sub>3</sub>-Catalyzed Synthesis of 1,2-Dimetallic Compounds by Direct Insertion of Aluminum or Zinc Powder
作者:Tobias D. Blümke、Thomas Klatt、Konrad Koszinowski、Paul Knochel
DOI:10.1002/anie.201205169
日期:2012.9.24
In‐sertion of metal: Catalytic amounts of InCl3 allow the insertion of aluminum and zinc into aromatic 1,2‐dibromides or 1,2‐bromotriflates (see scheme). These 1,2‐dimetallic species can undergo Cu or Pd‐catalyzed acylations, allylations, or cross‐couplings.
1,2-dizinc reagents can be prepared by an indium-catalyzed insertion of zincpowder into aromatic 1,2-dibromides or 1-bromo-2-triflates. These 1,2-dimetallics undergo Cu- or Pd-catalyzed acylations, allylations, or cross couplings. A variety of functionalized 1,2-dizinc reagents can be prepared by an indium-catalyzed insertion of zincpowder into aromatic 1,2-dibromides or 1-bromo-2-triflates. These
Regioselective difunctionalization of arenes remains a long-standing challenge in organic chemistry. We report a novel and general Fe/Ti synergistic methodology for regioselective synthesis of various polysubstituted arenes through either E/E′ or Nu/E ortho difunctionalizations of arenes. Preliminary results showed that an unprecedented 1,2-Fe/Ti heterobimetallic arylene intermediate bearing two distinct
Kanewskaja; Brasjunas, Zhurnal Obshchei Khimii, 1959, vol. 29, p. 1930; engl. Ausg. S. 1900
作者:Kanewskaja、Brasjunas
DOI:——
日期:——
Indane-1,3-diones IX, synthèse et activité anti-inflammatoire de 2-polyaza-arylindane-1,3-diones et de leurs dérivés N- ou O-substitués
作者:S Robert-Piessard、D Leblois、P Kumar、JM Robert、G Le Baut、L Sparfel、B Robert、E Khettab、RY Sanchez、JY Petit、L Welin
DOI:10.1016/0223-5234(90)90193-7
日期:1990.11
A series of 2 polyaza-arylindane-1,3-diones diversely substituted on the heterocycle and the homocycle were synthetized in order to study their anti-inflammatory activity. These enaminodiketones give in alkaline medium polydent anions which can undergo, in presence of electrophilic agents, C, N or O-substitution. The Mitsunobu reaction proved to be the most useful method in attempts to gain regiospecific attack at nitrogen. Pharmacomodulation by the introduction of an ethyl group on the nitrogen of the basic molecule, eventually coupled with 5-methoxylation on the homocycle, proved to be fruitful in the pyridazinyl, pyrimidinyl and tetrazolyl series. Among the 3 most active molecules 31, 43 and 50, the second one was selected for a more detailed pharmacological study.