COMPOSITIONS AND METHODS FOR QUADRICYCLANE MODIFICATION OF BIOMOLECULES
申请人:Sletten Ellen May
公开号:US20130244267A1
公开(公告)日:2013-09-19
The present disclosure features a strain-promoted [2+2+2] reaction that can be carried out under physiological conditions. In general, the reaction involves reacting a pi-electrophile with a low lying LUMO with a quadricyclane on a biomolecule, generating a covalently modified biomolecule. The selectivity of the reaction and its compatibility with aqueous environments provides for its application in vivo and in vitro. The reaction is compatible with modification of living cells. In certain embodiments, the pi-electrophile can comprise a molecule of interest that is desired for delivery to a quadricyclane-containing biomolecule via [2+2+2] reaction.
The photoisomerization of 7-substituted norbornadiene-cyclodextrin inclusion complexes, in which the substituents are t-butoxyl, acetoxyl, and hydroxyl groups, gave 7-substituted quadricyclene-cyclodextrin inclusion complexes.
Tetracyclo[3.2.0.02,7.04,6]hept-1-ene: formation and trapping of 1,2-dehydroquadricyclane. Ab initio calculations on dehydroquadricyclanes
作者:Joachim Podlech、Kurt Polborn、Guenter Szeimies
DOI:10.1021/jo00067a053
日期:1993.7
Hydrogen chloride elimination from chloroquadicyclane 14 with tert-butyllithium or n-butyllithium/potassium tert-butoxide in ether at 0-degrees-C led to the title compound 4 as a reactive intermediate. Generating 4 with LDA in the presence of diphenylisobenzofuran (8) or trimethylisoindole (9) afforded the Diels-Alder adducts 18a and 19a. Ab initio calculations at the TCSCF/6-31G* level have been performed on the dehydroquadricyclanes 2-7, and total energies and olefinic strain energies have been determined for those molecules.