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Volumn 2, Issue 3, 2000, Pages 261-264

A ROMPGEL-supported N-hydroxysuccinimide: A host of acylations with minimal purification

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EID: 0000027580     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol991208w     Document Type: Article
Times cited : (52)

References (54)
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    • Benzylidenebis(tricyclohexylphosphine)dichlororuthenium 4 is commercially available from Fluka
    • Benzylidenebis(tricyclohexylphosphine)dichlororuthenium 4 is commercially available from Fluka.
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    • The polymer loading is equal to the molarity of the monomer.
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    • note
    • The ROMPGELs 3 obtained were sometimes soluble in dichloromethane or ethyl acetate depending the nature of the acyl substituent. In these cases, copolymerisaztion of the monomers 2 with norbornadiene (5 mol %) yielded an insoluble polymer.
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    • note
    • 3·3HF complex was the reagent of choice since all byproducts were liquids. Desilylation with tetrabutylammonium fluoride (TBAF) gave a crystalline polymer, presumably due to ammonium salts trapped in the resin, which led to poorer yields in subsequent acylation reactions.
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    • note
    • Amides 7cB, 7cC, 7dB, 7dC, 7eC, 7eC, and urea 7hA were synthesized in 79-97% yield and in greater than 95% purity by GCMS.
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    • note
    • ROMPGEL 3c (1.2 equiv) was treated with amine 6A to give amide 7cA (97% yield), hydrolyzed to ROMPGEL 8, reacylated with acid chloride 5a, and used to make amide 7aA (95% yield, > 95% purity). No cross contamination was observed.


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