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- W2015149685 abstract "Various unsymmetrically substituted conjugated diynes can be synthesized in a completely “pair”-selective manner via Pd-catalyzed reaction of terminal alkynes with 1,1-dichloroethylene in the presence of Pd(PPh3)4 followed by elimination with 2 equiv of lithium diisopropylamide (LDA), zincation with ZnBr2 or ZnCl2, and Pd-catalyzed cross-coupling with aryl and alkenyl iodides and bromides. The desired unsymmetrically substituted conjugated diynes have been obtained in >80% yields except in two cases where an alkenylzinc reagent generated in situ from (E)-3-iodo-2-propenol was used. The use of 1,1-dichloroethylene renders this method more economical than those involving 1,2-dihaloethylenes previously reported." @default.
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- W2015149685 date "2003-04-04" @default.
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- W2015149685 title "Strictly “Pair”-Selective and Economical Synthesis of Conjugated Diynes via Pd-Catalyzed Reaction of Terminal Alkynes with 1,1-Dichloroethylene, Elimination with LDA, and Subsequent Transformations" @default.
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- W2015149685 doi "https://doi.org/10.1021/op034029+" @default.
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