A Direct and Stereocontrolled Route to Conjugated Enediynes
作者:Graham B. Jones、Justin M. Wright、Gary W. Plourde、George Hynd、Robert S. Huber、Jude E. Mathews
DOI:10.1021/ja993766b
日期:2000.3.1
A unified synthetic route to 3-hex-en-1,5-diynes, a key building block found in many of the enediyne antitumor agents and designed materials, was developed. The method, which relies on a carbenoid coupling-elimination strategy is tolerant of a wide range of functionalities, and was applied to the synthesis of a variety of linear and cyclic enediynes. Reaction parameters can be adjusted to control stereoselectivity
A direct route to conjugated enediynes from dipropargylic sulfones by a modified one-flask Ramberg–Bäcklund reaction
作者:Xiaoping Cao、Yuying Yang、Xiaolong Wang
DOI:10.1039/b207296n
日期:——
The reaction of dipropargylic sulfones with dibromodifluoromethane in the presence of alumina-supported KOH in dichloromethane solution results in facile rearrangement affording the corresponding conjugated linear and cyclic enediynes in good yields. This result shows that the direct transformation of α- and α′-hydrogen bearing sulfones assembles enediyne units without resorting to the prior preparation
Towards enediyne libraries: cyclic enediynes via an intramolecular carbenoid coupling protocol
作者:Graham B. Jones、Robert S. Huber、Jude E. Mathews
DOI:10.1039/c39950001791
日期:——
Functionalised bioactive enediynes can be produced via an intramolecular carbenoid coupling of bis-prop-2-ynylic halides, and elaborated into useful synthons via their dicobalthexacarbonylcomplexes.
Cyclic conjugated enediynes related to calicheamicins and esperamicins: calculations, synthesis, and properties
作者:K. C. Nicolaou、Y. Ogawa、G. Zuccarello、E. J. Schweiger、T. Kumazawa
DOI:10.1021/ja00222a077
日期:1988.7
aux calicheamicines et aux esperamicines sont calculees et reliees a leur stabilite thermique. Le cyclodecenediyne est synthetise par transposition de Ramberg-Radilund, voie d'acces generale aux enediynes conjuguees cycliques; sa structure par rayons X est en accord avec les calculs et son mode de decomposition thermique est conforme au mecanisme de Bergman avance pour expliquer le mode d'attaque de
Les energies detension et les distances entre les carbones acetyleniques d'enediynes conjugues cycliques de structure analog aux calicheamicines et aux esperamicines sont calculees et reliees a leur stabilite thermique。Le cyclodecenediyne est synthetise par transposition de Ramberg-Radilund, voie d'acces generale aux enediynes conjuguees cycliques; sa 结构 par rayons X est en Accord avec les calculs
Nucleophilic Addition to a <i>p</i>-Benzyne Derived from an Enediyne: A New Mechanism for Halide Incorporation into Biomolecules
作者:Charles L. Perrin、Betsy L. Rodgers、Joseph M. O'Connor
DOI:10.1021/ja070023e
日期:2007.4.1
Biosynthesis of haloaromatics ordinarily occurs by electrophilic attack of an activated halogen species on an electron-rich aromatic ring. We now present the discovery of a new reaction whereby a nucleophilic halide anion can be attached even to an aromatic ring without activating substituents. We show that the enediyne cyclodeca-1,5-diyn-3-ene, in the presence of lithium halide and a weak acid, is