Unusual, chemoselective etherification of 2-hydroxy-1,4-naphthoquinone derivatives utilizing alkoxymethyl chlorides: scope, mechanism and application to the synthesis of biologically active natural product (±)-lantalucratin C
A novel etherification of 2-hydroxy-1,4-naphthoquinone derivatives with alkoxyalkyl chlorides and hydride bases is described. Precise study of the conditions and substrate scope suggested that the reaction occurs specifically in the molecule having a 2-hydroxy-1,4-benzoquinone skeleton. A chemoselective O-methylation reaction was achieved to afford a synthetically important intermediate, which offered
A palladium-promoted oxidative annulation reaction for the synthesis of structurally diverse naphthoquinone-containing heterocycles has been developed, providing switchable access to 1,2-naphthofuroquinones and densely functionalized cyclobutene-fused 1,4-naphthofuroquinones by selective enol/enolate-directed processes. The synthetic application was extended by late-stage functionalization of an anti-HIV
Reductant precursor for tellurium imaging compositions
申请人:Energy Conversion Devices, Inc.
公开号:US04532078A1
公开(公告)日:1985-07-30
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant precursors are of the formulae ##STR1## where Y.sub.1 is alkoxy, Y.sub.2 is chloro or alkoxy and Y.sub.3 is hydrogen, chloro or alkoxy. Methods are provided for synthesizing the reductant precursors.
Tellurium imaging composition including improved reductant precursor and
申请人:Energy Conversion Devices, Inc.
公开号:US04698184A1
公开(公告)日:1987-10-06
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant precursors are of the formulae ##STR1## where Y.sub.1 is alkoxy, Y.sub.2 is chloro or alkoxy and Y.sub.3 is hydrogen, chloro or alkoxy. Methods are provided for synthesizing the reductant precursors.
Imaging film and film-forming composition, method for recording electromagnetic radiation, quinone compounds and method of synthesizing quinone compounds
申请人:ENERGY CONVERSION DEVICES, INC.
公开号:EP0098020A2
公开(公告)日:1984-01-11
Imaging films and film-forming compositions are provided which include a reducible tellurium compound, a reductant precursor, a source of labile hydrogen incorporated in a matrix. The reductant precursors are of the formulae
or
where Y1 is alkoxy, Y2 is chloro or alkoxy and Y3 is hydrogen, chloro or alkoxy.
Methods are provided for synthesizing the reductant precursors.