Remarkably StableS-Oxides of Calix[4]thiophenes and Their Sulfonium Ylide from Reaction ofS-Oxide with Acetylene Derivative

2017 ◽  
Vol 46 (3) ◽  
pp. 389-391 ◽  
Author(s):  
Noritaka Takeuchi ◽  
Tsukasa Nakahodo ◽  
Hisashi Fujihara
Keyword(s):  
Acetylene Derivative ◽  
Sulfonium Ylide

Aqueous hemin catalyzed sulfonium ylide formation and subsequent [2,3]-sigmatropic rearrangements

2017 ◽  
Vol 19 (5) ◽  
pp. 1245-1249 ◽  
Author(s):  
Xiaofei Xu ◽  
Chang Li ◽  
Zhihao Tao ◽  
Yuanjiang Pan
Keyword(s):  
Efficient Strategy ◽  
Sigmatropic Rearrangements ◽  
Sulfonium Ylide

A mild and efficient strategy for the Doyle–Kirmse reaction is established and an unprecedented cascade C–H insertion is reported.

scholarly journals Spectral properties and photophysics of arylacetylenes in thin films

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Rebecca Flamini ◽  
Benedetta Carlotti ◽  
Anna Spalletti ◽  
Assunta Marrocchi
Keyword(s):  
Thin Films ◽  
Energy Transfer ◽  
Singlet State ◽  
Excited Singlet ◽  
Acetylene Derivative ◽  
Time Resolved ◽  
Homogeneous Surface ◽  
Blend Films ◽  
J Aggregates ◽  
Emitting Species

AbstractWe report the photobehaviour of a series of eight structurally related arylacetylene derivatives, in solution as well as in pristine and PC61BM blended thin-_lms. The formation of both H- and J-aggregates in the solid state have been demonstrated, and, interestingly, an energy transfer from H-aggregates or/and from residual "unstacked" molecules to J-aggregates has been found, the latter being the only emitting species. The fuorescence quenching by PC61BM at di_erent loadings has been studied in blend films, and it has been found particularly effcient in the case of a symmetrical peripheral substitution of the acetylene derivative core. Preliminary time-resolved measurements in emission (ns resolution) and in absorption (fs resolution) con_rmed the H⟶J energy transfer and underlined the presence of delayed fuorescence from Jaggregates, formed by energy transfer from the long-lived first excited singlet state of H-aggregates. In all cases, a homogeneous surface morphology of thin films.

ChemInform Abstract: Models for Reactions of Acetylene on Platinum(111): The μ3-η2-Acetylene Derivative.

ChemInform ◽  
1988 ◽  
Vol 19 (6) ◽  
Author(s):  
G. DOUGLAS ◽  
L. MANOJLOVIC-MUIR ◽  
K. W. MUIR ◽  
M. RASHIDI ◽  
C. M. ANDERSON ◽  
...  
Keyword(s):  
Acetylene Derivative

Evolution of a Chemical Strategy Toward the Synthesis of Unsymmetrically Oxidized Nuphar Alkaloids

Synlett ◽  
2019 ◽  
Vol 30 (14) ◽  
pp. 1632-1642
Author(s):  
Jacob J. Lacharity ◽  
Armen Zakarian
Keyword(s):  
Total Synthesis ◽  
First Generation ◽  
Second Generation ◽  
Third Generation ◽  
Successful Strategy ◽  
Synthesis Design ◽  
Sulfonium Ylide ◽  
Chemical Strategy

Here we describe the frustrations, joys, and unexpected turns experienced in our journey toward a successful strategy directed at the total synthesis of unsymmetrically oxidized Nuphar thioalkaloids. While many adjustments were made to our initial synthesis plan, our general approach to the construction of the central bis(spirothiolane) moiety remained unchanged. Specifically, each iteration of our synthesis design involved the formation of the thiaspirane motif through the stereodivergent coupling of a thietane with a metal carbenoid, followed by a Stevens-type rearrangement of the resulting sulfonium ylide.1 Introduction2 First-Generation Strategy3 Second-Generation Strategy4 Third-Generation Strategy5 Conclusion

scholarly journals First Stereoselective Total Synthesis of Ciryneol C

SynOpen ◽  
2019 ◽  
Vol 03 (02) ◽  
pp. 59-66
Author(s):  
Ambati Sharada ◽  
Lakshmi Srinivasa Rao Kundeti ◽  
Kallaganti V. S. Ramakrishna ◽  
Kommu Nagaiah
Keyword(s):  
Total Synthesis ◽  
Coupling Reactions ◽  
Asymmetric Total Synthesis ◽  
Acetylene Derivative ◽  
Wittig Olefination ◽  
Epoxide Opening ◽  
Key Steps

The acetylene derivative Ciryneol C was isolated from the roots of C. japonicum. The asymmetric total synthesis of Ciryneol C was achieved in seven steps, with Horner–Wittig olefination, regioselective epoxide opening, and Cadiot–Chodkiewicz coupling reactions being the key steps.

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