[EN] FORMATION OF CHROMANES AND CHROMENES BY USING SILVER(I) OR GOLD(I) SALTS OR COMPLEXES [FR] FORMATION DE CHROMANES ET DE CHROMÈNES PAR UTILISATION DE SELS OU DE COMPLEXES D'ARGENT (I) OU D'OR (I)
[EN] FORMATION OF CHROMANES AND CHROMENES BY USING SILVER(I) OR GOLD(I) SALTS OR COMPLEXES<br/>[FR] FORMATION DE CHROMANES ET DE CHROMÈNES PAR UTILISATION DE SELS OU DE COMPLEXES D'ARGENT (I) OU D'OR (I)
申请人:DSM IP ASSETS BV
公开号:WO2015028463A1
公开(公告)日:2015-03-05
The present invention relates to the method of preparing chiral chromanes and chromenes in high yields by intramolecular hydroarylation of chiral aryl alkynes catalysed by either a silver(I) or gold(I) salt or complex in combination of a specific acid or by a silver(I) or gold(I) metal salt or complex having specific anion. By the hydroarylation a chromene is formed which has a chiral centre in the 2 position. The corresponding chromane is obtained by hydrogenation of the chromenes.
Efficient Access to (All-<i>rac</i>)-α-Tocopherol Acetate by a Crombie Chromene Synthesis
作者:Vincent Gembus、Nathalie Sala-Jung、Daniel Uguen
DOI:10.1246/bcsj.82.843
日期:2009.7.15
In contrast to reports in the literature, the pyridine-catalysed condensation of phenolic compounds and conjugated aldehydes to chromenes was found to be applicable to trimethylhydroquinone 2a with the result of complementary convergent approaches to the title acetate using citral 3a and dihydromyrcene 9 as precursors of the phytyl residue.
FORMATION OF CHROMANES AND CHROMENES BY USING SILVER(I) OR GOLD(I) SALTS OR COMPLEXES
申请人:DSM IP Assets B.V.
公开号:EP3039017A1
公开(公告)日:2016-07-06
Formation of chromanes and chromenes by using silver(I) or gold(I) salts or complexes
申请人:DSM IP Assets B.V.
公开号:EP2842951A1
公开(公告)日:2015-03-04
The present invention relates to the method of preparing chiral chromanes and chromenes in high yields by intramolecular hydroarylation of chiral aryl alkynes catalysed by either a silver(I) or gold(I) salt or complex in combination of a specific acid or by a silver(I) or gold(I) metal salt or complex having specific anion. By the hydroarylation a chromene is formed which has a chiral centre in the 2 position. The corresponding chromane is obtained by hydrogenation of the chromenes.