Stereoselective reduction of β,δ-diketo esters derived from tartaric acid. A facile route to optically active 6-oxo-3,5-syn-isopropylidenedioxyhexanoate, a versatile synthetic intermediate of artificial HMG Co-A reductase inhibitors.
作者:Tatsuya Minami、Kyoko Takahashi、Tamejiro Hiyama
DOI:10.1016/0040-4039(93)85115-d
日期:1993.1
Reduction of beta,delta-diketo esters derived from tartaric acid with HAl(i-Bu)2 gave stereoselectively beta-hydroxy-delta-keto esters which were reduced with NaBH4 and Et2BOMe to beta,delta-syn-dihydroxy esters. This strategy was successfully applied to the synthesis of t-butyl (3R,5S)-6-oxo-3,5-isopropylidenedioxyhexanoate starting from D-tartrate.
ALTENBACH, HANS-JOSEF;HOLZAPFEL, WINFRIED, ANGEW. CHEM., 102,(1990) N, C. 64-65
作者:ALTENBACH, HANS-JOSEF、HOLZAPFEL, WINFRIED
DOI:——
日期:——
Synthesis of a biologically active analogue of antibiotic A-32390A
作者:Jack E. Baldwin、Robert M. Adlington、Andrew T. Russell、Marie L. Smith
DOI:10.1039/c39940000085
日期:——
The total synthesis of a biologically active analogue of antibiotic A-32390A is described.
描述了一种生物活性抗生素A-32390A类似物的总合成。
Synthesis of Artificial HMG-CoA Reductase Inhibitors Based on the Olefination Strategy
作者:Tamejiro Hiyama、Tatsuya Minami、Kyoko Takahashi
DOI:10.1246/bcsj.68.364
日期:1995.1
Synthetic methods were studied for optically active 6-oxo-3,5-isopropylidenedioxyhexanoate esters (4), which could be used as a key precursor of various kinds of artificial analogs of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors. An enantiomer (+)-4 was prepared by asymmetric reduction of β,δ-diketo esters derived from the Taber’s alcohol or l-tartrate followed by a series of chemical transformations, and the desired enantiomer (−)-4 was prepared by the same asymmetric reduction starting from d-tartrate. The key intermediate (−)-4 was finally converted into a highly potent HMG-CoA reductase inhibitor, NK-104.