Ring opening reactions of 6-oxo-substituted spiro-pyrrolidinediones: Synthesis of 4-substituted-1,5-dihydro-3-hydroxy-2-oxo-1,5-diphenyl-2<i>H</i>-pyrroles
作者:David W. Emerson、Richard L. Titus、Marlon D. Jones
DOI:10.1002/jhet.5570350320
日期:1998.5
Reaction of 2-oxocylalkaneglyoxylate esters with N-phenylmethyleneaniline yields spiro compounds such as 2-aza-3,4,6,-trioxo-1,2-diphenylspiro[4.4]nonane 4 and cycloalkane-2-aza-3,4,6-trioxo-1,2-diphenylspiro-[4.5]decanes 5–7. These undergo solvolytic opening of the the oxocycloalkane ring to yield 4-substituted-1,5-dihydro-3-hydroxy-2-oxo-1,5-diphenyl-2H-pyrroles 12–17.
2-氧代羰基烷氧基甲酸酯与N-苯基亚甲基苯胺反应生成螺环化合物,例如2-氮杂-3,4,6,-三氧代-1,2-二苯基螺[4.4]壬烷4和环烷-2-氮杂-3,4,6 -trioxo-1,2,diphenylspiro- [4.5]癸烷5-7。它们经历氧代环烷烃环的溶剂化开放,从而产生4-取代的1,5-二氢-3-羟基-2-氧代-1,5-二苯基-2 H-吡咯12-17。