Synthesis of the enantiomeric forms of .alpha.- and .beta.-alkoxy carbonyl compounds from the (2S,3R)-2,3-diol prepared in fermenting bakers' yeast from .alpha.-methylcinnamaldehyde
The stereocontrolled total synthesis of altohyrtin A/spongistatin 1: the CD-spiroacetal segment
作者:Ian Paterson、Mark J. Coster、David Y.-K. Chen、Karl R. Gibson、Debra J. Wallace
DOI:10.1039/b504148a
日期:——
Stereocontrolled syntheses of the C16-C28 CD-spiroacetal subunit of altohyrtin A/spongistatin1 , relying on kinetic and thermodynamic control of the spiroacetal formation, are described. The kinetic control approach resulted in a slight preference (60 : 40) for the desired spiroacetal isomer. The thermodynamic approach allowed ready access to the desired spiroacetal by acid-promoted equilibration
依赖于螺缩醛形成的动力学和热力学控制,描述了altohyrtin A /海绵抑素1的C16-C28 CD-螺缩醛亚基的立体控制合成。动力学控制方法导致所希望的螺缩醛异构体稍微偏爱(60∶40)。通过热力学方法,可以通过酸促进的平衡,C23差向异构体的色谱分离以及不希望的异构体重新达到平衡条件,从而容易地获得所需的螺缩醛。这种可扩展的合成序列提供了数克的,因此能够成功完成altohyrtin A /海绵体抑素1的总合成,如本系列文章的第4部分所报道。
FUGANTI, C.;GRASSELLI, P.;SPREAFICO, F.;ZIROTTI, C.;CASATI, P., J. ORG. CHEM., 1984, 49, N 3, 543-546
作者:FUGANTI, C.、GRASSELLI, P.、SPREAFICO, F.、ZIROTTI, C.、CASATI, P.
DOI:——
日期:——
SYNTHETIC GLUCOPYRANOSYL LIPID ADJUVANTS AND VACCINE COMPOSITIONS AS WELL AS PHARMACEUTICAL COMPOSITIONS CONTAINING THEM