189564-10-1Relevant articles and documents
New analogs of the pyripyropene family of ACAT inhibitors via α-pyrone fragmentation and γ-acylation/cyclization
Obata, Rika,Sunazuka, Toshiaki,Tian, Zhiming,Tomoda, Hiroshi,Harigaya, Yoshihiro,Omura, Satoshi,Smith III, Amos B.
, p. 935 - 936 (2007/10/03)
The pyridine moiety of pyripyropene A was replaced with other aromatic and heteroaromatic substituents via α-pyrone degradation followed by dienolate γ-acylation and in situ cyclization.
Chemical modification and structure-activity relationships of pyripyropenes. 3. Synthetic conversion of pyridine-pyrone moiety
Obata, Rika,Sunazuka, Toshiaki,Tian, Zhiming,Tomoda, Hiroshi,Harigaya, Yoshihiro,Omura, Satoshi
, p. 229 - 236 (2007/10/03)
Structure-activity relationships of the pyridine-pyrone moiety in pyripyropene A (1), a potent acyl-CoA:cholesterol acyltransferase (ACAT) inhibitor of fungal origin, were studied. Several kinds of aromatic or hetero ring substituents for the pyridine moiety were synthesized using unique degradation reaction, following by γ-acylation. All the six synthesized analogs decreased the inhibitory activity with 20 to 200 times larger IC50 values than that of 1. Furthermore, the pyridine-pyrone substituent also dramatically decrease the inhibitory activity. Thus, the pyridine-pyrone moiety is important for eliciting potent ACAT inhibition.