Esters of pyroglutamic acid having the structure:
where R' and R" are the same or different and are each represented by H or the grouping
where
n is an interger of from 1 to 3
w is zero, or an integer of from 1 to 21
x is zero, or an integer of from 1 to 4
y is zero, or an integer of from 1 to 2
z is zero, or an integer of from 1 to 4
provided that the total number of of carbon atoms in each of said grouping will not exceed 22; and provided also that when the subgrouping. (CH=CH) is present, then the total number of carbon atoms in said grouping will be from 16 to 22. Synthesis, and uses of the said esters in topical compositions are also grovided.
具有以下结构的焦谷
氨酸酯: 其中 R'和 R "相同或不同,且各自由 H 或 n 为 1 至 3 之间的整数 w 为零,或 1 至 21 之间的整数 x 为零,或 1 至 4 之间的整数 y 为零,或 1 至 2 之间的整数 z 为零,或 1 至 4 之间的整数,条件是每个所述基团中的碳原子总数不超过 22;另外,如果存在子基团 (CH=CH),则所述基团中的碳原子总数为 16 至 22。 还提供了所述酯的合成以及在外用组合物中的用途。