Rational Synthesis of High Nuclearity Mo/Fe/S Clusters:  The Reductive Coupling Approach in the Convenient Synthesis of (Cl4-cat)2Mo2Fe6S8(PR3)6[R = Et,nPr,nBu] and the New [(Cl4-cat)2Mo2Fe2S3O(PEt3)3Cl]·1/2(Fe(PEt3)2(MeCN)4) and (Cl4-cat)2Mo2Fe3S5(PEt3)5Clusters

2001 ◽  
Vol 40 (23) ◽  
pp. 5985-5999 ◽  
Author(s):  
Jaehong Han ◽  
Markos Koutmos ◽  
Saleem Al Ahmad ◽  
Dimitri Coucouvanis
Keyword(s):  
Reductive Coupling ◽  
Convenient Synthesis ◽  
Coupling Approach

ChemInform Abstract: Indium-Mediated Reductive Coupling of Acyl Cyanides: A Convenient Synthesis of 1,2-Diketones.

ChemInform ◽  
2001 ◽  
Vol 32 (2) ◽  
pp. no-no
Author(s):  
Heung Soo Baek ◽  
Sung Jae Lee ◽  
Byung Woo Yoo ◽  
Jae Jung Ko ◽  
Sung Hoon Kim ◽  
...  
Keyword(s):  
Reductive Coupling ◽  
Convenient Synthesis

Indium-mediated reductive coupling of acyl cyanides: a convenient synthesis of 1,2-diketones

2000 ◽  
Vol 41 (42) ◽  
pp. 8097-8099 ◽  
Author(s):  
Heung Soo Baek ◽  
Sung Jae Lee ◽  
Byung Woo Yoo ◽  
Jae Jung Ko ◽  
Sung Hoon Kim* ◽  
...  
Keyword(s):  
Reductive Coupling ◽  
Convenient Synthesis

Intramolecular Oxidative Coupling of Aromatic Compounds. VII. A Convenient Synthesis of (±)-Deoxyschizandrin

1994 ◽  
Vol 47 (8) ◽  
pp. 1579 ◽  
Author(s):  
AR Carroll ◽  
RW Read ◽  
WC Taylor
Keyword(s):  
Aromatic Compounds ◽  
Oxidative Coupling ◽  
Claisen Rearrangement ◽  
Oxidative Cleavage ◽  
Reductive Coupling ◽  
Convenient Synthesis

A convenient synthesis of (�)-deoxyschizandrin was achieved through the key step of reductive coupling of the bisacetonylbiphenyl (3). The latter compound was synthesized by oxidative cleavage of the bis olefin (5) formed by Claisen rearrangement of the bismethallyl ether of 2,2′,4,4′-tetramethoxybiphenyl-3,3′-diol. The synthesis of 2,2′,4,4′-tetramethoxy-6,6′-di(prop 1-enyl)biphenyl-3,3′-diol (2) is also described. The diphenolic oxidation of (2) did not lead to products with β,β′ carbons linked.

Glass transition for dipolar hard spheres: a mode-coupling approach

1998 ◽  
Vol 77 (2) ◽  
pp. 305-311 ◽  
Author(s):  
Thomas Scheidsteger, Rolf Schilling
Keyword(s):  
Glass Transition ◽  
Mode Coupling ◽  
Hard Spheres ◽  
Coupling Approach

Convergent Total Synthesis of Principinol D, a Rearranged Kaurane Diterpenoid

2019 ◽  
Author(s):  
Timothy Newhouse ◽  
Aneta Turlik ◽  
Yifeng Chen ◽  
Anthony Scruse
Keyword(s):  
Total Synthesis ◽  
Natural Product ◽  
Late Stage ◽  
Membered Ring ◽  
Entry Point ◽  
Ketone Reduction ◽  
Coupling Approach

<div> <p>The total synthesis of principinol D, a rearranged kaurane diterpenoid, is reported. This grayanane natural product is constructed via a convergent fragment coupling approach, wherein the central 7-membered ring is synthesized at a late stage. The bicyclo[3.2.1]octane fragment is accessed by a Ni-catalyzed α-vinylation reaction. Strategic reductions include a diastereoselective SmI<sub>2</sub>-mediated ketone reduction with PhSH and a new protocol for selective ester reduction in the presence of ketones. The convergent strategy reported herein may be an entry point to the larger class of kaurane diterpenoids.</p> </div>

Convenient Synthesis of (Z)-7- and (E)-9-dodecene-1-yl Acetate, Components of Some Lepidoptera Insect Sex Pheromone

2017 ◽  
Vol 68 (1) ◽  
pp. 180-185
Author(s):  
Adriana Maria Andreica ◽  
Lucia Gansca ◽  
Irina Ciotlaus ◽  
Ioan Oprean
Keyword(s):  
Sex Pheromone ◽  
Coupling Reaction ◽  
Coupling Scheme ◽  
Lithium Aluminium Hydride ◽  
Terminal Alkyne ◽  
Mercury Derivative ◽  
Lithium Aluminium ◽  
Convenient Synthesis ◽  
Practical Synthesis ◽  
Insect Sex

Were developed new and practical synthesis of (Z)-7-dodecene-1-yl acetate and (E)-9-dodecene-1-yl acetate. The routes involve, as the key step, the use of the mercury derivative of the terminal-alkyne w-functionalised as intermediate. The synthesis of (Z)-7-dodecene-1-yl acetate was based on a C6+C2=C8 and C8+C4=C12 coupling scheme, starting from 1,6-hexane-diol. The first coupling reaction took place between 1-tert-butoxy-6-bromo-hexane and lithium acetylide-ethylendiamine complex obtaining 1-tert-butoxy-oct-7-yne, which is transformed in di[tert-butoxy-oct-7-yne]mercury. The mercury derivative was directly lithiated and then alkylated with 1-bromobutane obtaining 1-tert-butoxy-dodec-7-yne. After acetylation and reduction with lithium aluminium hydride of 7-dodecyne-1-yl acetate gave (Z)-7-dodecene-1-yl acetate with 96 % purity. The synthesis of (E)-9-dodecene-1-yl acetate was based on a C8+C2=C10 and C10+C2=C12 coupling scheme, starting from 1,8-octane-diol. The first coupling reaction took place between 1-tert-butoxy-8-bromo-octane and lithium acetylide-ethylendiamine complex obtaining 1-tert-butoxy-dec-9-yne, which is transformed in di[tert-butoxy-dec-9-yne]mercury. The mercury derivative was directly lithiated and then alkylated with 1-bromoethane obtaining 1-tert-butoxy-dodec-9-yne. After reduction with lithium aluminium hydride of 1-tert-butoxy-(E)-9-dodecene and acetylation was obtained (E)-9-dodecene-1-yl acetate with 97 % purity.

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