Structure-taste relationships of L-aspartyl-aminomalonic acid diesters.
作者:MASAHIKO FUJINO、MITSUHIRO WAKIMASU、MITSUHIKO MANO、KUNIYOSHI TANAKA、NOBUO NAKAJIMA、HISASHI AOKI
DOI:10.1248/cpb.24.2112
日期:——
L-Aspartyl-aminomalonic acid diesters are representatives of new group of sweet compounds. Chemical synthesis of the dipeptide esters was effected by coupling carbobenzoxy-β-benzylaspartic acid with an aminomalonic acid diester by the conventional activated ester method, followed by catalytic hydrogenation to remove the protecting groups. Among the 21 products, trans-2-methyl-cyclohexyl, methyl diester was over 5000 times sweeter than sucrose, 2, 6-dimethyl-cyclohexyl, methyldiester was about 5000 times sweeter and fenchyl, methyl diester was over 20000 times sweeter. These compounds appear to be the most potent sweeteners known of either natural or synthetic origin. On the basis of the potencies of the products, structure-taste relations in the C-terminal part of this molecule were discussed in detail.
L-天冬氨酰-氨基丙二酸双酯代表一类新的甜味化合物。该二肽酯的化学合成是通过采用传统的活性酯方法将苄氧羰基-β-苄基天冬氨酸与一种氨基丙二酸双酯偶联,然后通过催化氢化去除保护基团来实现的。在21种产物中,反式-2-甲基-环己基甲酯的甜度超过蔗糖的5000倍,2,6-二甲基-环己基甲酯的甜度约为蔗糖的5000倍,而蒎基甲酯的甜度超过蔗糖的20000倍。这些化合物似乎是目前已知的最强效的甜味剂,无论是天然来源还是合成来源。基于这些产物的甜度,详细讨论了该分子C末端部分的结构-味觉关系。