Potent Oligomerization and Macrocyclization Activity of the Thioesterase Domain of Vicenistatin Polyketide Synthase
摘要:
The thioesterase domain of the polyketide synthase involved in the biosynthesis of the 20-membered macrolactam antibiotic vicenistatin (VinTE) was found to catalyze oligomerization and macrocyclization of omega-hydroxy fatty acid ethyl esters to afford 17-28-membered macrocyclic lactones. The ring sizes of the macrocycles appear to be limited to the more moderate sizes because of the space limitation of the active site of VinTE. It was also verified that the initially formed linear dimer is first released from the active site of VinTE and then is recognized again by VinTE prior to its transformation to the cyclic dimer.
Polymer-supported synthesis of series of macrocyclic oligoesters
作者:Manfred Rothe、Michael Zieger
DOI:10.1016/0040-4039(94)88413-7
日期:1994.11
ε-hydroxycaproic acid, resp., were attached to a cross-linked polystyrene by an activated ester bond. In the presence of strong tert. bases cyclo-oligomerization occurred on the resin yielding a series of macrocyclic rings which were isolated with up to 10 ω-hydroxy acid residues and 91 ring atoms.