Asymmetric Allylboration of Aldehydes with Pinacol Allylboronates Catalyzed by 1,1′-Spirobiindane-7,7′-diol (SPINOL) Based Phosphoric Acids
作者:Chun-Hui Xing、Yuan-Xi Liao、Yimei Zhang、Darya Sabarova、Monica Bassous、Qiao-Sheng Hu
DOI:10.1002/ejoc.201101739
日期:2012.2
The asymmetricallylboration of aldehydes with pinacolallylboronates catalyzed by 1,1′-spirobiindane-7,7′-diol (SPINOL) basedphosphoricacids is described. 6,6′-Bis(2,4,6-triisopropylphenyl)SPINOL-based phosphoricacid was found to be a general, highly enantioselective catalyst for such allylboration reactions and excellent enantioselectivities were obtained for different types of aldehydes including
Kinetic Resolution of Homoaldols via Catalytic Asymmetric Transacetalization
作者:Ilija Čorić、Steffen Müller、Benjamin List
DOI:10.1021/ja108642s
日期:2010.12.15
The highly enantioselective kinetic resolution of homoaldols via a transacetalization reaction has been achieved. A novel phosphoric acid, STRIP, based on a spirocyclic 1,1'-spirobiindane backbone was designed and identified as a superior catalyst for this transformation. Remarkably, both secondary and tertiary homoaldols gave equally excellent results.