Selecting Double Bond Positions with a Single Cation-Responsive Iridium Olefin Isomerization Catalyst
نویسندگان
چکیده
منابع مشابه
Selective isomerization–carbonylation of a terpene trisubstituted double bond†
Selective catalytic carbonylation of the trisubstituted double bond of citronellic acid is enabled via an isomerization–functionalization approach. Alkoxycarbonylation with [{1,2-(Bu2PCH2)2C6H4}Pd(OTf)2] as a catalyst precursor occurs with >97% selectivity for the terminal diester dimethyl-3,7-dimethylnonane-dioate. This prevails much over the typical cationic methoxyaddition. The reactive prim...
متن کاملSimple, Chemoselective, Catalytic Olefin Isomerization
Catalytic amounts of Co(Sal(tBu,tBu))Cl and organosilane irreversibly isomerize terminal alkenes by one position. The same catalysts effect cycloisomerization of dienes and retrocycloisomerization of strained rings. Strong Lewis bases like amines and imidazoles, and labile functionalities like epoxides, are tolerated.
متن کاملPrevention of undesirable isomerization during olefin metathesis.
1,4-Benzoquinones have been found to prevent olefin isomerization of a number of allylic ethers and long-chain aliphatic alkenes during ruthenium-catalyzed olefin metathesis reactions. Electron-deficient benzoquinones are the most effective additives for the prevention of olefin migration. This mild, inexpensive, and effective method to block olefin isomerization increases the synthetic utility...
متن کاملCorrection to “Simple, Chemoselective, Catalytic Olefin Isomerization”
Page 16788 and Supporting Information page SI-4. Entry 13 was inadvertently omitted from Table 1 and S.I. Table 1. This entry suggests mechanistic overlap between our alkene isomerization and hydrogen atom transfer radical polymer-ization, more so than entry 12 alone. The complete S.I. Table 1 is shown below. This is an open access article published under an ACS AuthorChoice License, which perm...
متن کاملA One-Pot Tandem Olefin Isomerization/Metathesis-Coupling (ISOMET) Reaction
A tandem catalytic reaction has been developed as part of a process to discover tungsten-based olefin metathesis catalysts that have a strong preference for terminal olefins over cis or trans internal isomers in olefin metathesis. This tandem isomerization/terminal olefin metathesis reaction (ISOMET) converts Cn trans internal olefins into C2n−2 cis olefins and ethylene. This reaction is made p...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2021
ISSN: 0002-7863,1520-5126
DOI: 10.1021/jacs.0c11601