Trifluoromethanesulfonic (triflic) Anhydride
نویسندگان
چکیده
منابع مشابه
Strained olefin enables triflic anhydride mediated direct dehydrative glycosylation.
For the first time, we demonstrated that Tf2O mediated direct dehydrative glycosylation was possible simply with strained olefins, and other typical bases were inhibitors of this reaction. We optimized the glycosylation conditions and found that typical benzyl protected 1-OH pyranosyl donors and certain alcohol acceptors were suitable for our glycosylation system. Furthermore, we found that com...
متن کاملSilver triflate and triflic anhydride-promoted expedient synthesis of acylated 1-aminoisoquinolines.
A practical and convergent synthesis of biologically active 1-(N-acyl)-1-aminoisoquinolines from the reaction of 2-alkynylbenzaldoximes with amides has been realized. The readily available amides could be activated with triflic anhydride (Tf2O) and could efficiently participate in the domino reaction of 2-alkynylbenzaldoximes when catalyzed by AgOTf, thus providing various acylated 1-aminoisoqu...
متن کاملMechanistic Studies on a Sulfoxide Transfer Reaction Mediated by Diphenyl Sulfoxide/Triflic Anhydride
Sulfoxides are frequently used in organic synthesis as chiral auxiliaries and reagents to mediate a wide variety of chemical transformations. For example, diphenyl sulfoxide and triflic anhydride can be used to activate a wide range of glycosyl donors including hemiacetals, glycals and thioglycosides. In this way, an alcohol, enol or sulfide is converted into a good leaving group for subsequent...
متن کاملTailor-made synthesis of various backbone-substituted imidazolinium salts by triflic anhydride mediated intramolecular cyclisation.
We have found a Tf(2)O-mediated intramolecular cyclization reaction and have revealed an intriguing stereoselectivity and a regioselectivity during the preparation of intermediate alcohols, which allow for the tailor-made synthesis of various backbone-substituted imidazolinium salts, and structurally specific syn-4,5-disubstituted imidazolinium salts.
متن کاملMechanistic Pathways in Amide Activation: Flexible Synthesis of Oxazoles and Imidazoles
The preparation of substituted aminooxazoles and aminoimidazoles from α-arylamides and α-aminoamides through triflic anhydride-mediated amide activation is reported. These reactions proceed via the intermediacy of nitrilium adducts and feature N-oxide-promoted umpolung of the α-position of amides as well as a mechanistically intriguing sequence that results in sulfonyl migration from nitrogen t...
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ژورنال
عنوان ژورنال: Synlett
سال: 2004
ISSN: 0936-5214,1437-2096
DOI: 10.1055/s-2003-45005