Metal-Free Transfer Hydroiodination of C–C Multiple Bonds
作者:Weiqiang Chen、Johannes C. L. Walker、Martin Oestreich
DOI:10.1021/jacs.8b12318
日期:2019.1.16
The design and a gram-scalesynthesis of a bench-stable cyclohexa-1,4-diene-based surrogate of gaseous hydrogen iodide are described. By initiation with a moderately strong Brønsted acid, hydrogen iodide is transferred from the surrogate onto C-C multiple bonds such as alkynes and allenes without the involvement of free hydrogen iodide. The surrogate fragments into toluene and ethylene, easy-to-remove
描述了基于环己-1,4-二烯的气态碘化氢替代品的设计和克级合成。通过用中等强度的布朗斯台德酸引发,碘化氢从替代物转移到 CC 多重键上,例如炔烃和丙二烯,而没有游离碘化氢的参与。代用品碎片化为甲苯和乙烯,易挥发废物。这种氢碘化反应避免了对碘化氢或氢碘酸的不稳定处理。通过这种方式,可以以立体控制的方式访问范围广泛的以前未知或难以制备的乙烯基碘。
Stereoselektive Synthesen von substituierten Tricarbonyl[tris(methylen)methan]eisen(0)-Komplexen
Stereoselective Syntheses of Substituted Tricarbonyl[tris(methylen)methan]iron(0) Complexes
取代的三羰基[三(亚甲基)甲烷]铁(0)配合物的立体选择性合成
Total Synthesis of (±)-Gracilioether F
作者:Xin-Yue Shen、Xiao-Shui Peng、Henry N. C. Wong
DOI:10.1021/acs.orglett.6b00161
日期:2016.3.4
Totalsynthesis of (±)-gracilioether F was achieved via a pivotal reductivecleavage of 1,2-dioxane from allenic ester in 11 steps. The key 1,2-dioxane species, derived from singlet oxygen and a diene, could be used as a common precursor for a stereocontrolled formation of the crucial 1,4-diol through a reductivecleavage.
Hydroxamic acid derivatives of 3-Phenyl propionic acids useful as therapeutic agents for treating anthrax poisoning
申请人:Johnson Alan T.
公开号:US20080188566A1
公开(公告)日:2008-08-07
Compounds having the formula
wherein the symbols have the meaning described in the specification are hydroxamic acid derivatives of 3-phenyl-propionic acid and capable of inhibiting the lethal effects of infection by anthrax bacteria and are useful in the treatment of poisoning by anthrax.
Synthesis of Azepino[4,5-b]indolones by an Intramolecular Cyclization of Unsaturated Tryptamides
作者:Kavirayani Prasad、John Nidhiry
DOI:10.1055/s-0034-1379083
日期:——
A facile general route for the synthesis of azepino[4,5-b]indolones is presented. The strategy involves a Bronsted acid assisted intramolecularcyclization of unsaturated tryptamides. The methodology developed has been applied to the synthesis of the ABCD tetracyclic core of the natural product tronocarpine.