13C‐NMR, and ESI‐MS). The newly prepared compounds were screened for their antimicrobial activity against seven bacterial and five fungal strains. The DNAphotocleavage potential of these compounds was also evaluated by using agarose gel electrophoresis, and bispyranopyrazoles 4b, 4d and 4e exhibited significant level of DNA photocleavage activity.
Self-assembly of molecular devices containing a ferrocene, a porphyrin and a quinone in a triple macrocyclic architecture
作者:Richard W. Wagner、Philip A. Brown、Thomas E. Johnson、Jonathan S. Lindsey
DOI:10.1039/c39910001463
日期:——
Porphyrinogen self-assembly is compatible with a structurally diverse set of meta-linked dialdehyde building blocks, providing rapid access under gentle conditions to porphyrins bearing redox-active units positioned in a 3-dimensional architecture.
Alkyne‐based click polymerizations have been well‐established. However, in order to expand the family to synthesize polymers with new structures and novel properties, new types of click polymerizations are highly demanded. In this study, for the first time, we established a new efficient and powerful phenol‐yne click polymerization. The activated diynes and diphenols could be facilely polymerized in
A Non-Cross-Coupling Approach to Arene-Bridged Macrocycles: Synthesis, Structure, and Direct, Regioselective Functionalization of a Cycloparaphenylene Fragment
作者:Nirmal K. Mitra、Rolande Meudom、John D. Gorden、Bradley L. Merner
DOI:10.1021/acs.orglett.5b01102
日期:2015.6.5
A new synthetic strategy that employs a relatively unstrained, 1,4-diketo-bridged macrocycle as a precursor to a strained, 1,4-arene-bridged (bent para-phenylene) macrocycle has been developed. The distorted p-terphenyl nucleus (CPP fragment) of the macrocycle has been characterized by X-ray crystallography, and a direct, regioselective bromination protocol of the macrocyclic system is reported.
An Enaminone-Directed Benzannulation/Macrocyclization Approach to Cyclophane Ring Systems
作者:F. Christopher Pigge、Fatemeh Ghasedi、Nigam P. Rath
DOI:10.1021/jo0256181
日期:2002.6.1
A straightforward and modular preparative approach to 1,3,5-triaroylbenzene-based functionalized cyclophane ring systems has been developed. The key cyclophane-forming macrocyclization reaction was accomplished during the course of a regioselective cross-benzannulation between bis(aryl ethynyl) ketone and enaminone reactants. Macrocyclic products with ring sizes ranging from 18-to 22-membered were successfully constructed. The composition of the tether connecting the two aryl ethynyl ketone fragments can be easily varied; consequently, this method is suitable for construction of a diverse range of structurally distinct cyclophane products. To illustrate this feature, cyclophanes possessing xylyl, alkyl, di(ethylene triamine), and di(ethylene oxy) bridging units were synthesized in isolated yields of 11-46%. Three new cyclophanes (calixarene-like macrocyles 8 and 9, as well as crownophane 18) were structurally characterized by X-ray diffractometry.