Lewis Acid Catalyzed Reductive Cyclization of 2‐Aryloxybenzaldehydes and 2‐(Arylthio)benzaldehydes to Unsubstituted 9
<i>H</i>
‐Xanthenes and Thioxanthenes in Diisopropyl Ether
作者:Shashi Kant Verma、Anamika Prajapati、Manoj Kumar Saini、Ashok K. Basak
DOI:10.1002/adsc.202000836
日期:2021.1.19
Readily accessible 2‐aryloxybenzaldehydes and 2‐(arylthio)benzaldehydes undergo a sequence of reactions leading to a wide variety of unsubstituted 9H‐xanthenes and thioxanthenes in high yields when heated with a Lewisacid in diisopropyl ether. This reductive cyclization method is compatible with several important functional groups. The method is also applicable for the selective reductive cyclization
SULFUR CHELATED RUTHENIUM COMPOUNDS USEFUL AS OLEFIN METATHESIS CATALYSTS
申请人:Ben-Gurion University Of The Negev Research And Development Authority
公开号:US20140155511A1
公开(公告)日:2014-06-05
Sulfur chelated ruthenium compounds represented by the following formula:
wherein M indicates the ruthenium metal bound to a benzylidene carbon; R represents C
1
-C
7
alkyl group or optionally substituted aryl; X
1
and X
2
each independently represent halogen; Y
1
and Y
2
each independently denote unsubstituted or alkyl-substituted phenyl; and Z independently represents hydrogen, electron withdrawing or electron donating substituent, with m being an integer from 1 to 4, and processes and compositions related thereto.
A New Synthetic Route to Unsymmetrical 9-Arylxanthenes
作者:Sajal Kumar Das、Ritesh Singh、Gautam Panda
DOI:10.1002/ejoc.200900676
日期:2009.10
A facile and general three-step synthetic route towards unsymmetrical 9-arylxanthenes was developed. The reaction sequence involves nucleophilic substitution of commercially available 2-fluorobenzaldehydes with arenoxides, Grignard reaction of the resulting 2-arenoxybenzaldehydes with arylmagnesium bromides, followed by FeCl3-catalyzed intramolecular diarylmethylation of the resulting carbinols. This
Sulfur chelated ruthenium compounds useful as olefin metathesis catalysts
申请人:Lemcoff Gabriel N.
公开号:US08513151B2
公开(公告)日:2013-08-20
Sulfur chelated ruthenium compounds represented by the following formula:
wherein M indicates the ruthenium metal bound to a benzylidene carbon; R represents C1-C7 alkyl group or optionally substituted aryl; X1 and X2 each independently represent halogen; Y1 and Y2 each independently denote unsubstituted or alkyl-substituted phenyl; and Z independently represents hydrogen, electron withdrawing or electron donating substituent, with m being an integer from 1 to 4, and processes and compositions related thereto.