作者:Harro PETERSEN
DOI:10.1055/s-1973-22190
日期:——
The cyclocondensation of ureas, thioureas, guanidines, or sulfamides with an aldehyde or ketone and a suitable nucleophilic compound in accordance with the principle of "α-ureidoalkylation" or "vinylogous ureidoalkylation" leads to the formation of saturated or unsaturated mono- and polycyclic heterocycles. The rings may be separated or may be linked in the 1,2- or 1,3-position. Spiro compounds can also be formed. The 5-, 6-, 7-, and 8-membered rings accessible in this way can contain further hetero atoms such as, for example, O, S, N, or P. Synthesis possibilities, properties, substitution reactions, and rearrangement reactions of these heterocycles are described. 1. Definition and Mechanisms of Cyclocondensations according to the Principle of α-Ureidoalkylation and Vinylogous Ureidoalkylation 2. Cyclocondensations by α-Ureidoalkylation of H-Acidic Compounds 2.1. α-Ureidoalkylation of OH-Acidic Compounds 2.2. α-Ureidoalkylation of SH-Acidic Compounds 2.3. α-Ureidoalkylation of Primary Amines 2.4. α-Ureidoalkylation of Ureas, Thioureas, Guanidines, and Sulfamides 2.5. α-Ureidoalkylation of CH-Acidic Compounds 3. Cyclocondensations by α-Ureidoalkylation of Olefins and Other Unsaturated Compounds 4. Cyclocondensations by α-Ureidoalkylation of Nucleophilic Phosphorus Compounds 5. Cyclocondensations by Vinylogous Ureidoalkylation 6. Closing Comments
根据 "δ-脲基烷基化 "或 "乙烯基脲基烷基化 "的原理,脲类、硫脲类、胍类或氨基磺化物与醛或酮和适当的亲核化合物进行环缩合,可形成饱和或不饱和的单环和多环杂环。 这些环可以分开,也可以在 1,2- 位或 1,3- 位相连。还可以形成螺化合物。以这种方式可获得的 5、6、7 和 8 元环可以包含更多的杂原子,例如 O、S、N 或 P。 1.根据δ-脲基烷基化和乙烯基脲基烷基化原理进行的环缩合反应的定义和机理 2.H-Acidic Compounds by δ±-Ureidoalkylation of H-Acidic Compounds 2.1.OH 酸性化合物的 δ-脲基烷基化 2.2.δ-脲基烷基化 SH 酸性化合物 2.3.伯胺的δ-脲基烷基化 2.4.脲、硫脲、胍和氨基磺的δ±-脲基烷基化 2.5.CH 酸性化合物的 δ-脲基烷基化 3.烯烃和其他不饱和化合物的 δ-脲烷基化环缩合反应 4.亲核磷化合物δ-脲烷基化的环缩合作用 5.乙烯基脲基烷基化的环缩合作用 6.结束语