Holzapfel, Monika; Kilpert, Claus; Steglich, Wolfgang, Liebigs Annalen der Chemie, 1989, p. 797 - 802
作者:Holzapfel, Monika、Kilpert, Claus、Steglich, Wolfgang
DOI:——
日期:——
HOLZAPFEL, MONIKA;KILPERT, CLAUS;STEGLICH, WOLFGANG, LIEBIGS ANN. CHEM.,(1989) N, C. 797-801
作者:HOLZAPFEL, MONIKA、KILPERT, CLAUS、STEGLICH, WOLFGANG
DOI:——
日期:——
A Novel Route to Stereoselective Synthesis of (4R,5S)-O-Acetylosmundalactone and (4S,5R)-O-Acetylosmundalactone
作者:Gan Yonghong、Zhang Fangning、Pan Xinfu
DOI:10.1039/a901144g
日期:——
A route has been developed for the enantioselective synthesis of (4R,5S)-O-acetylosmundalactone 1 and (4S,5R)-O-acetylosmundalactone 2 by using Sharpless kinetic resolution of the racemic 1-(2-furyl)ethanol 6 as a key step.
K1115 B1, isolated from the broth of Streptomyces species, was found to be a mixture of stereoisomers. Authors synthesized all stereoisomers of K1115 B1 by convergent synthesis coupling a rhamnose derivative, an isobenzofuranone, and a chiral tetraol. Comparison of 1H NMR spectra and optical rotations made it clear that the absolute structures of K1115 B1α (the major isomer) and K1115 B1β (the minor
从链霉菌属菌种的肉汤中分离出的K1115 B 1被发现是立体异构体的混合物。作者通过收敛合成鼠李糖衍生物,异苯并呋喃酮和手性四元醇的方法合成了K1115 B 1的所有立体异构体。比较1 1 H NMR谱和旋光讲明的K1115 B中的绝对结构1α(主要异构体)和K1115乙1β(次要异构体)为:(1 - [R,17小号) -和(1 - [R 17 - [R)-配置。立体异构体的旋光性表明,报道的铝霉素与K1115 B的结构相同1可能是立体异构体的另一种混合物。