Borate esters as convenient reagents for direct amidation of carboxylic acids and transamidation of primary amides
作者:Pavel Starkov、Tom D. Sheppard
DOI:10.1039/c0ob01069c
日期:——
with a variety of carboxylic acids and amines. With trimethyl or tris(2,2,2-trifluoroethyl) borate, amides are obtained in good to excellent yield and high purity after a simple work-up procedure. Tris(2,2,2-trifluoroethyl) borate can also be used for the straightforward conversion of primaryamides to secondary amidesvia transamidation.
Protiva et al., Collection of Czechoslovak Chemical Communications, 1959, vol. 24, p. 83,86
作者:Protiva et al.
DOI:——
日期:——
Direct Synthesis of Amides from Carboxylic Acids and Amines Using B(OCH<sub>2</sub>CF<sub>3</sub>)<sub>3</sub>
作者:Rachel M. Lanigan、Pavel Starkov、Tom D. Sheppard
DOI:10.1021/jo400509n
日期:2013.5.3
range of amines. In most cases, the amide products can be purified by a simple filtration procedure using commercially available resins, with no need for aqueous workup or chromatography. The amidation of N-protected amino acids with both primary and secondary amines proceeds effectively, with very low levels of racemization. B(OCH2CF3)3 can also be used for the formylation of a range of amines in good