32114-49-1Relevant academic research and scientific papers
Spectroscopic Studies on the Intramolecular Hydrogen Abstraction Reaction of n-Alkyl Anthraquinone-2-carboxylates
Tanimoto, Yoshifumi,Uehara, Megumu,Takashima, Masanobu,Itoh, Michiya
, p. 3121 - 3128 (1988)
Chain lenghts dependence of the intramolecular hydrogen abstraction reaction of n-alkyl anthraquinone-2-carboxylates (AQ-n, n=2-20) has been studied by steady-state photolysis, phophorescence, laser flash photolysis, and two-step laser induced fluorescence spectroscopies.All the results indicate that the excited triplet of the anthraquinone chromophore abstracts a hydrogen atom from its methylene side chain, whose rate increases with increasing chain lenght.The rate constant of AQ-8 is 1E4 s-1 and the increase in the rate is about 1.5E4 s-1 per one additional methylene unit for n>/=10.
Diels–Alder reactions of an elusive 1,3-butadiene bearing 2-carboxy and 4-alkoxy substituents
Chen, Szu-Han,Chang, Che-Hsuan,Fang, Jim-Min
supporting information, p. 4293 - 4296 (2016/09/09)
A reactive diene, ethyl 2-methylene-4-(pent-3-oxy)but-2-enoate, bearing electron-withdrawing carboxy and electron-donating pentoxy substituents is prepared and trapped in situ by a variety of dienophiles to form [4+2] cycloaddition products. Diels–Alder reaction of this diene with fumarate esters gives multiply substituted cyclohexenes that are useful for building the scaffold of oseltamivir.
