The First Successful Crystallographic Characterization of a Cyclodextrin Dimer: Efficient Synthesis and Molecular Geometry of a Doubly Sulfur-Bridged β-Cyclodextrin
the latter two species yields a single head-to-head-coupled beta-cyclodextrin dimer 5 with two sulfur linkers at adjacent 6-methylene carbons. NMR and X-ray analysis revealed the trans-type ("aversive") linkage of both beta-cyclodextrin units. In the solid-state structure of 5.5 MeOH.23 H(2)O, the undistorted cyclodextrin macrocycles feature almost parallel ring planes pointing away from each other
The present invention provides compounds of formula M-L-M′ (where M and M′ are each independently a monomeric moiety of Formula (I) and L is a linker). The dimeric compounds have been found to be effective in promoting apoptosis in rapidly dividing cells.
A built-in route leading to a self-inclusion complex of 6<sup>A</sup>,6<sup>B</sup>-(bis-<i>O-p</i>-allyloxyphenyl)hexakis(2,3-di-<i>O</i>-methyl)-α-cyclodextrin
作者:Zhen Chen、Jerald S. Bradshaw、Yoichi Habata、Milton L. Lee
DOI:10.1002/jhet.5570340342
日期:1997.5
Hexakis(2,3-di-O-methyl)-α-cyclodextrin was treated with 2,4-dimethoxybenzene-1,5-disulfonyl chloride to give 6A,6B-di-O-sulfonated product 5 in only a 3.0% yield. When treated with sodium p-allyloxyphenoxide, 5 gave 6A,6B-(bis-O-p-allyloxyphenyl)hexakis(2,3-di-O-methyl)-α-cyclodextrin (6) in a 57% yield. A careful 1H nmr analysis of 6 shows that one of the allyloxphenyl groups is in the α-cyclodextrin
Self-Inclusion Complexes Derived from Cyclodextrins: Synthesis and Characterization of 6<sup>A</sup>,6<sup>B</sup>-Bis-<i>O</i>-[<i>p</i>-(allyloxy)phenyl]-Substituted β-Cyclodextrins
作者:Zhen Chen、Jerald S. Bradshaw、Guoliang Yi、Dongjin Pyo、Delbert R. Black、S. Scott Zimmerman、Milton L. Lee、Weida Tong、Valerian T. D'Souza
DOI:10.1021/jo960679i
日期:1996.1.1
clodextrin (3), which had two isomers. One (3A) has the two p-(allyloxy)phenyl arms directed away from the cyclodextrincavity, and the other (3B) has one of the p-(allyloxy)phenyl groups through the cavity to form a self-inclusion complex. When either 3A or 3B was treated with methyl iodide and sodium hydride, the resulting permethylated 6(A),6(B)-bis-O-[p-(allyloxy)phenyl]heptakis(2,3-di-O-methyl)-6(C)