The contrasting behavior of cyclic and acyclic 2-amidomethyleneresorcinols towards cyclization with acetaldehyde
作者:H. E. Zaugg、D. L. Arendsen、R. S. Egan
DOI:10.1002/jhet.5570160105
日期:1979.1
The two cyclic amidomethylene resorcinols, 3a and 3b, readily undergo cyclization with acetaldehyde to the azacannabinoids 4 and 6, respectively. However, the acyclic amidomethylene resorcinol 10, under the same conditions, gives the benzodioxan 11. This contrasting behavior is rationalized in terms of conformational differences between 3a,b and 10.
两个环状酰胺基间苯二酚3a和3b容易用乙醛环化成氮杂大麻素4和6。然而,在相同条件下,无环氨基亚甲基间苯二酚10给出了苯并二恶烷11。根据3a,b和10之间的构象差异,可以使这种对比行为合理化。