Synthesis of polysubstituted pyrroles from sulfinimines (N-sulfinyl imines)
摘要:
Polysubstituted 2-carboxylate and 2-phosphonate pyrroles are prepared by aromatization of the corresponding 3-oxo 2-carboxylate and 2-phosphonate NH-pyrrolidines using air. Reaction of electrophiles with 3-oxo pyrrolidine dianions readily introduces substituents, regioselectively at C-4 in these pyrrolidines. (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis of polysubstituted pyrroles from sulfinimines (N-sulfinyl imines)
摘要:
Polysubstituted 2-carboxylate and 2-phosphonate pyrroles are prepared by aromatization of the corresponding 3-oxo 2-carboxylate and 2-phosphonate NH-pyrrolidines using air. Reaction of electrophiles with 3-oxo pyrrolidine dianions readily introduces substituents, regioselectively at C-4 in these pyrrolidines. (c) 2008 Elsevier Ltd. All rights reserved.
New Approaches to Polysubstituted Pyrroles and γ-Lactams Based on Nucleophilic Addition of Ti(IV) Enolates Derived from α-Diazo-β-keto Carbonyl Compounds to <i>N</i>-Tosylimines
作者:Changqing Dong、Guisheng Deng、Jianbo Wang
DOI:10.1021/jo0605039
日期:2006.7.1
The Ti(IV) enolates derivedfrom α-diazo-β-keto esters or ketones efficiently add to TiCl4-activated N-tosylimines to give δ-N-tosylamino substituted α-diazo-β-keto carbonyl compounds. The diazo decomposition of the addition products occurs under Rh2(OAc)4-catalyzed or photoinduced conditions to afford pyrrole or γ-lactam derivatives, both in high yields.