scholarly journals Substituent Effect on Claisen Rearrangement of 1-Substituted 2-Cinnamyloxybenzenes.

2002 ◽  
Vol 51 (5) ◽  
pp. 359-364 ◽  
Author(s):  
Yutaka OKADA ◽  
Motoyuki ADACHI ◽  
Takatoshi HAYASHI
Keyword(s):  
Substituent Effect ◽  
Claisen Rearrangement

ChemInform Abstract: Substituent Effect on the Claisen Rearrangement.

ChemInform ◽  
1990 ◽  
Vol 21 (31) ◽  
Author(s):  
G. DESIMONI ◽  
G. FAITA ◽  
A. GAMBA ◽  
P. P. RIGHETTI ◽  
G. TACCONI ◽  
...  
Keyword(s):  
Substituent Effect ◽  
Claisen Rearrangement

ortho-Claisen rearrangement. IX. Effect of solvent on the substituent effect

1970 ◽  
Vol 35 (10) ◽  
pp. 3585-3585 ◽  
Author(s):  
William North. White ◽  
Eugene F. Wolfarth
Keyword(s):  
Substituent Effect ◽  
Claisen Rearrangement ◽  
Effect Of Solvent

α-Alkoxyalkyl Triphenylphosphonium Salts: Synthesis and Reactions

2019 ◽  
Vol 23 (16) ◽  
pp. 1738-1755
Author(s):  
Humaira Y. Gondal ◽  
Zain M. Cheema ◽  
Abdul R. Raza ◽  
Ahmed Abbaskhan ◽  
M. I. Chaudhary
Keyword(s):  
Carbonyl Compounds ◽  
Claisen Rearrangement ◽  
Alder Reaction ◽  
Coupling Reactions ◽  
Phosphonium Salts ◽  
Organic Transformations ◽  
Enol Ethers ◽  
Wide Range ◽  
Synthetic Methodologies ◽  
Alkoxy Groups

Following numerous applications of Wittig reaction now functionalized phosphonium salts are gaining attention due to their characteristic properties and diverse reactivity. This review is focused on α-alkoxyalkyl triphenylphosphonium salts: an important class of functionalized phosphonium salts. Alkoxymethyltriphenylphosphonium salts are majorly employed in the carbon homologation of carbonyl compounds and preparation of enol ethers. Their methylene insertion strategy is extensively demonstrated in the total synthesis of a wide range of natural products and other important organic molecules. Similarly enol ethers prepared thereof are important precursors for different organic transformations like Diels-Alder reaction, Claisen rearrangement, Coupling reactions, Olefin metathesis and Nazarov cyclization. Reactivity of these α-alkoxyalkylphosphonium salts have also been studied in the nucleophilic substitution reactions. A distinctive application of this class of phosphonium salts was recently reported in the phenylation of carbonyl compounds under very mild conditions. Synthesis of structurally diverse alkoxymethyltriphenylphosphonium salts with variation in alkoxy groups as well as counter anions are reported in literature. Here we present a detailed account of different synthetic methodologies for the preparation of this unique class of quaternary phosphonium salts and their applications in organic synthesis.

Total Synthesis of Icaritin via Microwave-assistance Claisen Rearrangement

2014 ◽  
Vol 11 (9) ◽  
pp. 677-681 ◽  
Author(s):  
Van-Son Nguyen ◽  
Ling Shi ◽  
Yue Li ◽  
Qiu-An Wang
Keyword(s):  
Total Synthesis ◽  
Claisen Rearrangement ◽  
Microwave Assistance
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