Synthesis and binding studies of an optically pure hexadeoxy-1,4,5-tris(methylenesulfonic acid) analogue of IP3
摘要:
The synthesis of the (-)-sodium salt of the hexadeoxy-1,4,5-tris(methylene-sulfonic acid) analogue of IP3 by use of an asymmetric Diels-Alder reaction is described together with the effects of this compound in binding to the IP3 receptor.
A Dinickel Catalyzed Cyclopropanation without the Formation of a Metal Carbene Intermediate
作者:Arnab K. Maity、Annah E. Kalb、Matthias Zeller、Christopher Uyeda
DOI:10.1002/anie.202011602
日期:2021.1.25
Mechanistic studies reveal that a metal carbene intermediate is not part of the catalytic cycle. The (NDI)Ni2(CHSiMe3) complex was independently synthesized and found to be unreactive toward dienes. Based on DFT models, we propose an alternative mechanism that begins with a Ni2‐mediated coupling of (Me3Si)CHN2 and the diene. N2 extrusion followed by radical C−C bond formation generates the cyclopropane product
Expanded Scope in Ethylene−Alkyne Cross-Metathesis: Coordinating Heteroatom Functionality at the Propargylic Position
作者:Jason A. Smulik、Steven T. Diver
DOI:10.1021/ol006035l
日期:2000.7.1
[GRAPHICS]The Grubbs 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene-substituted ruthenium complex 1 catalyzed ethylene-alkyne cross-metathesis and was shown to tolerate free hydroxyl groups and coordinating functionality at the propargylic and homopropargylic positions, Hindered and enantiomerically enriched 1-substituted alkynes also react efficiently under the reported conditions.
Iridium-catalyzed stereoselective [3+2] annulation of α-oxocarboxylic acids with 1,3-dienes
作者:Ryota Yabe、Yusuke Ebe、Takahiro Nishimura
DOI:10.1039/d1cc02003j
日期:——
The stereoselective annulation of α-oxocarboxylic acids with 1,3-dienes proceeded in the presence of a hydroxoiridiumcatalyst to give α-hydroxy-γ-lactones in good yields with high 3,5-trans relative stereochemistry. The use of a chiraldiene ligand for a cationic iridium complex enabled asymmetricannulation with high enantioselectivity.
The synthesis of the (-)-sodium salt of the hexadeoxy-1,4,5-tris(methylene-sulfonic acid) analogue of IP3 by use of an asymmetric Diels-Alder reaction is described together with the effects of this compound in binding to the IP3 receptor.