Fluorophores related to the green fluorescent protein
摘要:
Imidazolin-5-one derivatives and isosteres (oxazolinones, butenolides, and pyrrolinones) of the 4-hydroxybenzylideneim-idazolinone chromophore of the GFP have been synthesized and their photophysical properties have been investigated. (C) 2004 Elsevier Ltd. All rights reserved.
α,β-Unsaturated butenolides in an organocatalytic doubly annulative cascade for the preparation of 3,4-dihydrocoumarins
作者:Dorota Kowalczyk-Dworak、Łukasz Albrecht
DOI:10.1039/c9ob00068b
日期:——
A new, organocatalytic doubly annulative cascade utilizing α,β-unsaturated butenolides and imines (derived from salicyl aldehydes and α-amino-γ-lactones) as starting materials is described. The developed strategy is based on two annulative processes: (1) initial [3 + 2]-dipolar cycloaddition allowing for the construction of a pyrrolidine ring; and (2) the butenolide-ring-opening reaction leading to