The total synthesis of cyclomarin C was accomplished through a convergent strategy from a tetrapeptide fragment and a tripeptide one. The developed methods to prepare the needed noncoded amino acids, the proper protection of peptide fragments, and identification of the optimum macrocylization site can be applied to further synthetic studies on other members of cyclomarins.
Quararibea Metabolites. 4.<sup>1</sup> Total Synthesis and Conformational Studies of (±)-Funebrine and (±)-Funebral
作者:Ying Dong、Niranjan、Sheri L. Ablaza、Shao-Xia Yu、Simon Bolvig、David A. Forsyth、Philip W. Le Quesne
DOI:10.1021/jo981501u
日期:1999.4.1
bond in the pyrrole lactone structures of (+/-)-funebrine, (+/-)-funebral, and related aldehydes has been probed by conformational dynamic studies, and the barriers for interconversion between conformations have been measured by full NMR line-shape analysis. Molecular mechanics (MMX) and a (1)H-(1)H NOE study indicate a distinct preferred conformation for (+/-)-funebrine.
The total synthesis of cyclomarin C was accomplished through a convergent strategy from a tetrapeptide fragment and a tripeptide one. The developed methods to prepare the needed noncoded amino acids, the proper protection of peptide fragments, and identification of the optimum macrocylization site can be applied to further synthetic studies on other members of cyclomarins.
Stereoselective synthesis of the dihydroxyisoleucine constituent of the amanita mushroom toxins
作者:Paul A. Bartlett、Donna J. Tanzella、James F. Barstow
DOI:10.1016/s0040-4039(00)86905-1
日期:1982.1
Ester-enolateClaisenrearrangement of -croytl N--Boc-glycinate and iodolactonization of the N-phthaloyl derivative of the resulting unsaturated acid are used as the stereocontrolling steps in a synthesis of the title compound.
-croytl N --Boc-甘氨酸的酯-烯酸酯克莱森重排和所得不饱和酸的N-邻苯二甲酰基衍生物的碘内酯化用作标题化合物合成中的立体控制步骤。