Ammonia-borane as a Catalyst for the Direct Amidation of Carboxylic Acids
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作者:
Ramachandran, P. Veeraraghavan
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Purdue Univ, Herbert C Brown Ctr Borane Res, Dept Chem, W Lafayette, IN 47907 USAPurdue Univ, Herbert C Brown Ctr Borane Res, Dept Chem, W Lafayette, IN 47907 USA
Ramachandran, P. Veeraraghavan
[1
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Hamann, Henry J.
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Purdue Univ, Herbert C Brown Ctr Borane Res, Dept Chem, W Lafayette, IN 47907 USAPurdue Univ, Herbert C Brown Ctr Borane Res, Dept Chem, W Lafayette, IN 47907 USA
Hamann, Henry J.
[1
]
机构:
[1] Purdue Univ, Herbert C Brown Ctr Borane Res, Dept Chem, W Lafayette, IN 47907 USA
Ammonia-borane serves as an efficient substoichiometric (10%) precatalyst for the direct amidation of both aromatic and aliphatic carboxylic acids. In situ generation of amine-boranes precedes the amidation and, unlike the amidation with stoichiometric amine-boranes, this process is facile with 1 equiv of the acid. This methodology has high functional group tolerance and chromatography-free purification but is not amenable for esterification. The latter feature has been exploited to prepare hydroxyl- and thiol-containing amides.
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ICCOM CNR, Inst Chem Organometall Cpds, Via Madonna Piano 10, I-50019 Florence, ItalyICCOM CNR, Inst Chem Organometall Cpds, Via Madonna Piano 10, I-50019 Florence, Italy
Rossin, Andrea
Peruzzini, Maurizio
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ICCOM CNR, Inst Chem Organometall Cpds, Via Madonna Piano 10, I-50019 Florence, ItalyICCOM CNR, Inst Chem Organometall Cpds, Via Madonna Piano 10, I-50019 Florence, Italy
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Department of Chemistry, Purdue University, West Lafayette,IN,47907, United StatesDepartment of Chemistry, Purdue University, West Lafayette,IN,47907, United States
Alawaed, Abdulkhaliq A.
Ramachandran, P. Veeraraghavan
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Department of Chemistry, Purdue University, West Lafayette,IN,47907, United StatesDepartment of Chemistry, Purdue University, West Lafayette,IN,47907, United States