Threading of di-, tri-, and tetra(ethylene glycol) through the macrocycle BPX26C6 in the presence of templating Na+ ions was proven by the synthesis of the corresponding [2]rotaxanes under solvent-free conditions. Among them, a [2]rotaxane featuring both tetra(ethylene glycol) and carbamate stations behaves as a molecular switch that can be controlled reversibly through the application of the KTFPB/[2
Efficient formation of water- and air-stable aza-ylides has been achieved using the Staudinger reaction between electron-deficient aromatic azides such as 2,6-dichlorophenyl azide and triarylphosphines. The reaction proceeds rapidly and has been successfully applied to chemical modification of proteins in living cells.
Cycloheptynes and cyclooctynes have been efficiently generated via a sulfoxide–magnesium exchange reaction of readily synthesized 2-sulfinylcycloalkenyl triflates.
环庚烯和环庚炔已通过易于合成的2-磺酰基环烯基三氟甲磺酸酯的亚砜-镁交换反应高效生成。
ALKYNES AND METHODS OF REACTING ALKYNES WITH 1,3-DIPOLE-FUNCTIONAL COMPOUNDS
申请人:UNIVERSITY OF GEORGIA RESEARCH FOUNDATION, INC.
公开号:US20160159732A1
公开(公告)日:2016-06-09
1,3-Dipole-functional compounds (e.g., azide functional compounds) can be reacted with certain alkynes in a cyclization reaction to form heterocyclic compounds. Useful alkynes (e.g., strained, cyclic alkynes) and methods of making such alkynes are also disclosed. The reaction of 1,3-dipole-functional compounds with alkynes can be used for a wide variety of applications including the immobilization of biomolecules on a substrate.
Nucleophilic transformations of azido-containing carbonyl compounds <i>via</i> protection of the azido group
作者:Takahiro Aimi、Tomohiro Meguro、Akihiro Kobayashi、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1039/d1cc01143j
日期:——
Nucleophilic transformations of azido-containing carbonylcompounds are discussed. The phosphazide formation from azides and di(tert-butyl)(4-(dimethylamino)phenyl)phosphine (Amphos) enabled transformations of carbonylgroups with nucleophiles such as lithium aluminum hydride and organometallic reagents. The good stability of the phosphazide moiety allowed us to perform consecutive transformations