[reaction: see text] The total synthesis of the antibacterial and antimycoticalkaloidhapalindole Q has been achieved in eight steps and 12.4% overall yield. The key step involves a regio- and diastereoselective Diels-Alder reaction to afford a bicyclo[2.2.2]oct-2-ene. This cycloadduct was subsequently dihydroxylated, cleaved, and converted to the natural product.
Ozonolysis of Bicyclic 1,2-Dioxines: Initial Scope and Mechanistic Insights
作者:Nicole M. Cain、Edward R. T. Tiekink、Dennis K. Taylor
DOI:10.1021/jo3001518
日期:2012.4.20
The ozonolysis of bicyclic 1,2-dioxines was investigated using a variety of 1,4-disubstituted 1,2-dioxines along with a 1,3-dialkyl and steroidal example, with yields ranging from moderate to excellent. Two different pathways were observed upon reaction of the 1,4-disubstituted 1,2-dioxines with ozone; one pathway saw the “expected” results, that is, cleavage of the olefinic moiety with generation
Poly(1,6-heptadiyne), a free-standing polymer film dopable to high electrical conductivity
作者:Harry W. Gibson、F. C. Bailey、Arthur J. Epstein、Heiko Rommelmann、Samuel Kaplan、John Harbour、Xiao Quing Yang、David B. Tanner、John M. Pochan
DOI:10.1021/ja00351a048
日期:1983.6
the surfaces of concentrated solutions of homogeneous Ziegler-Natta catalysts leads to insoluble, free-standing films with metallic luster. “Doping” of these films by treatment with acceptors results in conductivities up to 1 S/cm. The polymer has been characterized in terms of its molecular structure, its solid-state structure and physical properties, the nature of the doping process, and its thermal
Synthesis and Cross-Coupling Reactions of Substituted 5-Triflyloxyindoles
作者:Dylan B. England、Michael A. Kerr
DOI:10.1021/jo050706h
日期:2005.8.1
when subjected to a short series of simple transformations, produce synthetically useful quantities of 5-triflyloxyindoles in excellent overall yields. Such compounds are excellent participants in cross-coupling chemistry.