Synthesis of 2-Alkylideneisochromans by Cyclocarbonylative Sonogashira Reactions
نویسندگان
چکیده
منابع مشابه
Synthesis of fluorescent 2,3,5,6-tetraalkynylpyridines by site-selective Sonogashira-reactions of 2,3,5,6-tetrachloropyridines.
4-Substituted 2,3,5,6-tetraalkynylpyridines were prepared by tetra-fold Sonogashira reactions of the corresponding 2,3,5,6-tetrachloropyridines. 2,6-Dialkynyl-3,5-dichloropyridines were prepared by site-selective Sonogashira reactions from various 4-unsubstituted and 4-substituted tetrachloropyridines. Subsequent two-fold Sonogashira reactions of the products allowed for the synthesis of variou...
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Herein, we report on our findings of the Sonogashira-Hagihara reaction with 1-iodinated and 2-brominated glycals using several aromatic and aliphatic alkynes. This Pd-catalyzed cross-coupling reaction presents a facile access to alkynyl C-glycosides and sets the stage for a reductive/oxidative refunctionalization of the enyne moiety to regenerate either C-glycosidic structures or pyran derivati...
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reaction of 2-dimethylphosphono-1,3-benzodithiole 3a with conjugated 1,4-diketones for the preparation of 2,2'-bis(I,3dithiole) donors.[41 We have now used the Wittig-Horner reaction of 3 b, which was synthesized by a similar method as that for 3a,15] to prepare 1. In this case, a cyclopentadiene adduct ofp-benzoquinone 4 was used as a diketone and after introduction of the 1,3-dithiole rings t...
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ژورنال
عنوان ژورنال: European Journal of Organic Chemistry
سال: 2014
ISSN: 1434-193X
DOI: 10.1002/ejoc.201402979