PS-IIDQ: an efficient polymer-supported amide coupling reagent
作者:Eric Valeur、Mark Bradley
DOI:10.1039/b414889d
日期:——
Polystyrene-IIDQ is a polymer-supported coupling reagent that couples carboxylic acids to amines in good yields and high purity without the requirement of a pre-activation step. Importantly the order of addition of the amine, acid or coupling agent makes no difference to the efficiency of the coupling reaction and the reagent can be readily regenerated.
The present invention relates to alpha hydroxy amides including compounds of formula I
and related compounds and their use in the prophylaxis and treatment of inflammatory disorders and diseases, wherein:
T
1
denotes one of the following groups:
T
2
-W denotes one of the following groups:
W denotes a single bond, or a group selected from —CHR
c
— and —CH═CH—; and
R
W
denotes a group selected from H, Hal, linear or branched alkyl, Ar, Het, Cyc, —(CH
2
)
n
Ar, —(CH
2
)
n
Het, —(CH
2
)
n
Cyc, —(CH
2
)
n
OAr, —(CH
2
)
n
OHet, —(CH
2
)
n
OCyc, or A.
PS-IIDQ: a supported coupling reagent for efficient and general amide bond formation
作者:Eric Valeur、Mark Bradley
DOI:10.1016/j.tet.2007.06.019
日期:2007.9
Polystyrene-IIDQ, a polymer-supported coupling reagent, was synthesized in three steps from Merrifield resin in 86% overall conversion. This reagentefficiently coupled carboxylic acids to amines in good yields and high purities, required no pre-activation step, and was tolerant of the order of reagent addition. PS-IIDQ was observed to be more efficient than polymer-supported carbodiimides (PS-EDC and