An Efficient Combination of Microwave Dielectric Heating and the Use of Solid-Supported Triphenylphosphine for Wittig Reactions
摘要:
[GRAPHICS]Olefins could be formed in an efficient way by the use of stable ylides in just a few minutes using microwave dielectric heating. The drawback with the Wittig reaction in solution phase is the formation of I equiv of triphenylphosphine oxide. To avoid this, the corresponding protocol using the efficient combination of solid-supported triphenylphosphine and microwave dielectric heating was developed. An even more efficient one-pot three-step Wittig reaction was also developed.
Heterocyclic anti-epileptogenic agents and methods of use thereof
申请人:Weaver F. Donald
公开号:US20060014752A1
公开(公告)日:2006-01-19
Methods and compounds, such as β-heterocyclic-β-amino acids, useful for the inhibition of epileptogenesis are disclosed. Methods for preparing and using the β-heterocyclic-β-amino acids of the invention are also described.
The behavior of 2-chloroquinoline-3-carbaldehyde and 2-oxoquinoline-3-carbaldehyde toward stabilized methylenetriphenylphosphoranes and secondary amines
作者:Fatma A. El-Samahy、Nabila M. Ibrahim、Mohamed R. H. Mahran
DOI:10.1080/10426507.2015.1085042
日期:2016.1.2
Abstract In this study use was made of the Wittig carbonyl olefination reaction and stereo-identification of the resulting alkenes. Condensation of 2-chloroquinoline-3-carbaldehyde with some selected stabilized phosphonium ylides yielded a mixture of the corresponding E and Z olefins in each case. On the other hand reaction of 2-oxoquinoline-3-carbaldehyde with the selected ylides afforded the respective
An Efficient Combination of Microwave Dielectric Heating and the Use of Solid-Supported Triphenylphosphine for Wittig Reactions
作者:Jacob Westman
DOI:10.1021/ol0167053
日期:2001.11.1
[GRAPHICS]Olefins could be formed in an efficient way by the use of stable ylides in just a few minutes using microwave dielectric heating. The drawback with the Wittig reaction in solution phase is the formation of I equiv of triphenylphosphine oxide. To avoid this, the corresponding protocol using the efficient combination of solid-supported triphenylphosphine and microwave dielectric heating was developed. An even more efficient one-pot three-step Wittig reaction was also developed.