Diastereoselective Formation of Methylene-Bridged Glycoluril Dimers
作者:Dariusz Witt、Jason Lagona、Fehmi Damkaci、James C. Fettinger、Lyle Isaacs
DOI:10.1021/ol991382k
日期:2000.3.1
The acid-catalyzed formation of methylene-bridged glycoluril dimers yields the C-2v-diastereomer selectively. Product resubmission experiments establish that the selectivity is the result of thermodynamic control. A modified synthetic route is presented that allows for the preparation of unsymmetrically substituted dimers, We present the X-ray crystal structures of both diastereomers, This class of compounds is useful for studies of self-assembly in aqueous solution.
Introverted CB[N] Compounds
申请人:Isaacs Lyle David
公开号:US20100010215A1
公开(公告)日:2010-01-14
Inverted cucurbituril compounds having at least one pair of hydrogen atoms protruding into an internal molecular cavity thereof.
作者:Anxin Wu、Arindam Chakraborty、Dariusz Witt、Jason Lagona、Fehmi Damkaci、Marie A. Ofori、Jessica K. Chiles、James C. Fettinger、Lyle Isaacs
DOI:10.1021/jo0258958
日期:2002.8.1
Cyclic ethers 5a,d-f and 25-26 undergo highly diastereoselective dimerizationreactions to yield methylene-bridged glycoluril dimers with the formal extrusion of formaldehyde. Last, it is possible to perform selective heterodimerization reactions using both cyclic ethers and glycoluril derivatives bearing ureidyl NH groups. These reactions deliver the desired C- and S-shaped heterodimers with low to moderate
Synthesis of novel unsymmetrical molecular clips derived from glycoluril
作者:Hu Sheng-Li、Wu Yan-Dong、Cao Li-Ping、Wu An-Xin
DOI:10.3184/030823409x465349
日期:2009.7
Four novel unsymmetrical molecular clips derived fromglycoluril have been designed and synthesised and the structure and conformation of one was also confirmed by single crystal X-ray diffraction.