Organotin monohydrides were brought into reaction with a variety of mono- and disubstituted ethynes. The identity of the resulting products was established by means of elementary analysis, infrared absorption spectroscopy and proton magnetic resonance spectroscopy.
The diazo route to diazonamide A: studies on the tyrosine-derived fragment
作者:Francine N. Palmer、Franck Lach、Cyril Poriel、Adrian G. Pepper、Mark C. Bagley、Alexandra M. Z. Slawin、Christopher J. Moody
DOI:10.1039/b510653b
日期:——
the original structure of diazonamide A was prepared in eight steps from N-Z-tyrosine tert-butyl ester. Iodination, O-protection and Stille coupling gave the cinnamyl alcohol 25, converted via the bromide into the allyl aryl ether 27. Subsequent Claisen rearrangement and oxidative cleavage of the alkene gave the lactol 29, converted into the desired benzofuranone 31. The revision in the structure of
Ruthenium-Catalyzed<i>trans</i>-Selective Hydrostannation of Alkynes
作者:Stephan M. Rummelt、Alois Fürstner
DOI:10.1002/anie.201311080
日期:2014.4.1
In contrast to all other transition‐metal‐catalyzed hydrostannation reactions documented in the literature, the addition of Bu3SnH across various types of alkynes proceeds with excellent trans selectivity, provided the reaction is catalyzed by [Cp*Ru]‐based complexes. This method is distinguished by a broad substrate scope and a remarkable compatibility with functional groups, including various substituents
Process for the ruthenium catalyzed trans-selective hydrostannation of alkynes
申请人:Studiengesellschaft Kohle mbH
公开号:EP2865684A1
公开(公告)日:2015-04-29
The present invention refers to a process for the ruthenium-catalyzed trans-selective hydrostannation of alkynes and the so-obtained products. The inventive process makes use of a tin hydride which is reacted with an alkyne in the presence of a cyclopentadienyl-coordinated ruthenium catalyst.
[EN] PROCESS FOR THE RUTHENIUM CATALYZED TRANS-SELECTIVE HYDROSTANNATION OF ALKYNES<br/>[FR] PROCÉDÉ D'HYDROSTANNATION TRANS-SÉLECTIVE D'ALCYNES PAR CATALYSE AU RUTHÉNIUM
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2015059006A1
公开(公告)日:2015-04-30
The present invention refers to a process for the ruthenium-catalyzed trans-selective hydrostannation of alkynes and the so-obtained products. The inventive process makes use of a tin hydride which is reacted with an alkyne in the presence of a cyclopentadienyl-coordinated ruthenium catalyst.