working model suggests that the observed helicity of the porphyrin tweezer is dictated via steric differentiation experienced by the porphyrin ring bound to each chiral center. A variety of erythro and threo substrates were investigated to verify this chiroptical method. Their absoluteconfigurations were unequivocally determined, and thus a general mnemonic is provided for the assignment of chirality
报告了确定赤型和苏型二醇、氨基醇和二胺的绝对构型的通用且灵敏的非经验方案。通过增加金属卟啉的路易斯酸度,可以大大增强二醇与卟啉镊子系统的结合。在卟啉镊子主体和手性底物之间形成的超分子复合物表现出基于手性中心取代基的具有可预测符号的激子耦合双信号 CD 光谱。工作模型表明,观察到的卟啉镊子的螺旋度是通过与每个手性中心结合的卟啉环所经历的空间分化来决定的。研究了各种赤型和苏型底物以验证这种手性方法。他们的绝对配置是明确确定的,
Total Synthesis of Incarnatapeptins A and B
作者:Feipeng Han、Jie Li、Shupeng Li、Zhuo Wang、Yian Guo、Tao Ye
DOI:10.1002/anie.202317636
日期:2024.2.26
Harnessing the photoredox-mediated decarboxylative 1,4-addition reaction and the unusual use of silver carbonate to promote N-acylation, the first totalsynthesis of incarnatapeptins A and B has been achieved, which unambiguously confirmed the structure of these natural products.
Spiro asymmetric induction. 3. Synthesis of optically pure syn- or anti-.alpha.,.beta.-dihydroxy esters by the aldol condensation of chiral glycolate enolates
作者:William H. Pearson、Minn Chang Cheng
DOI:10.1021/jo00390a044
日期:1987.7
LEASSON, W. H.;CHENG, MINN-CHANG, J. ORG. CHEM., 52,(1987) N 14, 3176-3178