作者:Dov Ben-Ishai、Janina Altman、Zmira Bernstein
DOI:10.1016/0040-4020(77)80413-4
日期:——
The reactions of urea, methylurea and dimethylureas with glyoxylic acid and its methyl ester to give α-substituted hydantoic acid derivatives (4, 5, 6, 7) and substituted allantoic acid derivatives (8) is discussed. The cyclization of the hydantoates and allantoates to 5-substituted hydantoins (11, 12) is also described.
尿素,甲基脲和二甲基脲与乙醛酸和反应中的甲酯,得到α -取代的脲基乙酸衍生物(4,5,6,7)和取代的尿囊酸衍生物(8)进行了讨论。的hydantoates和allantoates的5-取代乙内酰脲(环化11,12)也被描述。