作者:T. Popović、Lea Sokolić、Nevenka Modrić、A. Palković、M. Poje
DOI:10.1016/s0040-4020(01)80927-3
日期:1991.1
(6) arose on exposure of the primary adduct 4 to dilute acetic acid; a direct route to 6 was provided by oxidation of 1-iminoallantoin (2) with iodine. Both dehydro-allantoin (8) and its 4-imino analogue 6 form covalent adducts (e.g. with MeOH) at the 5-position. A brief rationale which focusses upon the stepwise nature and regiochemical course of the reaction is presented.
显示两个连续的Denicke反应产物的表示是不正确的。铁氰化物在氨水中氧化尿酸(1a)得到5-氨基-4-亚氨基丙氨酸(4)和1,5-二氨基-3,7-二氧代-2,4,6,8-四氮杂双环[3.3.0]辛烷(5a),而甲基化尿酸1b-g仅提供相应的终产物5。当初级加合物4暴露于稀乙酸中时,产生关键的脱氢-4-亚氨基丙氨酸(6)。通过用碘氧化1-亚氨基丙氨酸(2)提供了一条通往6的直接途径。脱氢丙氨酸(8)及其4-亚氨基类似物6在5位形成共价加合物(例如与MeOH)。简要介绍了反应的逐步性质和区域化学过程的基本原理。