Electrophilic Cyclization of Aryldiacetylenes in the Synthesis of Functionalized Enediynes Fused to a Heterocyclic Core
作者:N. A. Danilkina、A. E. Kulyashova、A. F. Khlebnikov、S. Bräse、I. A. Balova
DOI:10.1021/jo501396s
日期:2014.10.3
variety of asymmetrically substituted acyclic enediynes fused to heterocycles. The tolerance of the developed methodology to a variety of functional groups is a great advantage in the synthesis of macrocyclic enediyne systems fused to a heterocyclic core. Synthesis of indole-fused 12-membered macrocyclic dienediyne was achieved using ring-closingmetathesis as a key step.
Acylation reactions of silylated butadiynes: synthesis of some naturally occuring diacetylenic ketones
作者:Graham E. Jones、Andrew B. Holmes
DOI:10.1016/s0040-4039(00)88596-2
日期:1982.1
Acylation of 4-substituted 1-trimethylsilylbuta-1,3-diynes (2) with suitable acyl halides in the presence of titanium tetrachloride gave diacetylenicketones (3) including the naturally occurring compounds (3c), (3e), and (3f).
Oxaenediynes through the Nicholas-Type Macrocyclization Approach
作者:Anna G. Lyapunova、Natalia A. Danilkina、Alexander F. Khlebnikov、Beate Köberle、Stefan Bräse、Irina A. Balova
DOI:10.1002/ejoc.201600767
日期:2016.10
macrocyclization has been used for the first time for the synthesis of 10- and 11-membered oxaenediynes fused to a benzothiophene. The acyclic starting materials were easily synthesized by electrophilic cyclization of o-(buta-1,3-diynyl)thioanisoles followed by a Sonogashira coupling of the resulting 2-ethynyl-3-iodobenzothiophenes with functionalized alkynes. A high reactivity of the 10-membered oxacycles
For the first time, electrophiliccyclization and ring-closingmetathesis were used as keysteps in the synthesis of a macrocyclic enediyne system, which allowed a 12-membered dienediyne containing a thiophene-fused ring to be obtained. The macrocycle synthesized represents a class of