Visible light driven room temperature Pauson–Khand reaction

Coleman, Anthony C.; Long, Conor; Meetsma, Auke; Feringa, Ben L.; Browne, Wesley R.; Pryce, Mary T.

doi:10.1039/b911228f

Cited by 14 publications

(9 citation statements)

References 60 publications

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“…Pauson–Khand reactions are often applied to prepare cyclopentenone scaffolds by cocyclization of alkynes, alkenes and CO. − The decarbonylation step from an alkyne-cobalt complex can be promoted thermally, but an improved functional group tolerance can be obtained with other activation methods such as microwave, ultrasound, and especially light irradiation . Asano and Yoshida reported a microflow protocol for the photoinitiated Pauson–Khand reaction .…”

Section: Continuous-flow Photochemistry In Organic Synthesismentioning

confidence: 99%

Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment

et al. 2016

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Continuous-flow photochemistry in microreactors receives a lot of attention from researchers in academia and industry as this technology provides reduced reaction times, higher selectivities, straightforward scalability, and the possibility to safely use hazardous intermediates and gaseous reactants. In this review, an up-to-date overview is given of photochemical transformations in continuous-flow reactors, including applications in organic synthesis, material science, and water treatment. In addition, the advantages of continuous-flow photochemistry are pointed out and a thorough comparison with batch processing is presented.

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Section: Continuous-flow Photochemistry In Organic Synthesismentioning

confidence: 99%

Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment

et al. 2016

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“…Reagents: All chemicals were purchased from commercial suppliers and were used as received. The synthesis of [Co 2 (CO) 6 (η 2 ‐Me 3 SiC≡CH)] was performed according to published procedures31–33 using some modifications to increase selectivity and yield.…”

Section: Methodsmentioning

confidence: 72%

Hexacarbonyl (Trimethylsilyl Ethyne) Dicobalt as MOCVD Precursor for Thin Cobalt Layer Formation

Georgi

Hildebrandt

Tuchscherer

et al. 2013

Zeitschrift anorg allge chemie

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The low melting Co0 source [Co2(CO)6(η2‐Me3SiC≡CH)] (3) was prepared as a precursor system for the metal‐organic chemical vapor deposition (MOCVD) of cobalt. The synthesis of 3 was realized by the reaction of trimethylsilyl acetylene (2) with dicobalt octacarbonyl (1) in n‐hexane at ambient temperature. Vapor pressure measurements and TG‐MS analysis were performed revealing the suitability of 3 in the CVD process. Cobalt layers formed in a vertical cold wall CVD reactor were characterized by SEM, EDX, and XPS. The appropriate metallic films consist of a mixture of cobalt and cobalt oxide.

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“…Dicobaltatetrahedranes 3a-i have been synthesized according to published reaction procedures [35][36][37] which are modied to increase selectivity and yield. In this respect, dicobaltoctacarbonyl 1 was reacted with alkynes 2a-i in n-hexane at ambient temperature for 2 h (Scheme 1).…”

Section: Resultsmentioning

confidence: 99%

“…Compounds 3a-i were prepared in a modied reaction protocol according to published procedures. [35][36][37] All other chemicals were purchased from commercial suppliers and were used as received. Fig.…”

Section: Reagentsmentioning

confidence: 99%

A cobalt layer deposition study: Dicobaltatetrahedranes as convenient MOCVD precursor systems

et al. 2014

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Low melting or liquid cobalt(0) MOCVD precursors of type [Co 2(CO)6(2-RCCR')] (R = H, R' = (CH 3)3Si, nC4H9, nC5H11, nC6H 13, nC7H15; R = nC 3H7, R' = (CH3)3Si, CH3; R = R' = C2H5, (CH3)3Si) have been prepared by the reaction of the appropriate alkynes with Co2(CO) 8. Variation of the substituents at the C,C triple bond allowed the study of their influence on the thermal behaviour and vapour pressure. These measurements showed that the cobalt(0) precursors are suitable for application within the MOCVD (Metal-Organic Chemical Vapour Deposition) process. Decomposing deposition of the cobalt precursors was realized in a home-built vertical cold-wall CVD reactor under mild conditions without any addition of co-reactants. The obtained dense and conformal cobalt layers have been characterized by SEM, EDX and XPS measurements. Depending on the precursor applied, pure cobalt films (96.7% Co) or mixtures of cobalt, carbon and cobalt oxide with varying composition with layer thicknesses of 35-90 nm were formed

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Visible light driven room temperature Pauson–Khand reaction

Abstract: Visible light driven decarbonylation of [(mu(2)-alkyne)Co(2)(CO)(6)] complexes enables the formation of cyclopentenones in good yields at ambient temperatures.

Cited by 14 publications

References 60 publications

Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment

Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment

Hexacarbonyl (Trimethylsilyl Ethyne) Dicobalt as MOCVD Precursor for Thin Cobalt Layer Formation

A cobalt layer deposition study: Dicobaltatetrahedranes as convenient MOCVD precursor systems

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