[EN] SINGLET OXYGEN-LABILE LINKERS AND METHODS OF PRODUCTION AND USE THEREOF<br/>[FR] LIEURS LABILES À L'OXYGÈNE SINGULET ET PROCÉDÉS DE PRODUCTION ET D'UTILISATION ASSOCIÉS
申请人:YOU YOUNGJAE
公开号:WO2013163321A1
公开(公告)日:2013-10-31
Activatable compositions that include at least one functional moiety and at least one cleavable linker directly or indirectly linked to the at least one functional moiety are disclosed. The at least one functional moiety is inactive when linked to the linker and activated upon cleavage of the linker. Methods of production and use of the activatable composition are also disclosed.
t-butanol containing potassium t-butoxide and in ethanol containing sodiumethoxide. The rates of the E2 reaction of the sulphur compounds are found to be 102–103 times as great as those of the corresponding oxygen analogues in both media. These rates can be correlated with Hammett σ values. The ρ values obtained for sulphur compounds are 1·98 and 2·14 in t-butanol and ethanol, while those for oxygen
The reactions of several gem- and vic-polychloroethanes containing 3–5 Cl atoms with PhONa in dimethyl sulfoxide and with PhSNa in N,N-dimethylformamide were examined. Either the mono-, di-, or tetra-substituted compounds of polychloroethylenes were obtained as the main products, depending on the kinds of substrates as well as on the amounts of the bases. The reaction products from polychloroethylenes
A Convenient Synthetic Route to Functionalized 5-Trifluoroacetyl-6-trifluoromethyl-3,4-dihydro-2<i>H</i>-pyrans: Hetero-Diels-Alder Reaction of β,β-Bis(trifluoroacetyl)vinyl Ethers with Electron-Rich Alkenes
作者:Masaru Hojo、Ryōichi Masuda、Etsuji Okada
DOI:10.1055/s-1990-26874
日期:——
Hetero-Diels-Alder reaction of β,β-bis(trifluoroacetyl)vinyl ethers, which are prepared by acylation of vinyl ethers with trifluoroacetic anhydride, with electron-rich alkenes such as vinyl ethers, ethyl vinyl sulfide and 1,1-diphenoxyethylene proceed quite easily under mild conditions to afford 2,4-dialkoxy-, 2-ethoxy-4-phenoxy-, 2-ethylthio-4-alkoxy-, 2,2-diphenoxy-4-ethoxy- and, 4-diaryloxy-5-trifluoroacetyl-6-trifluoromethyl-3,4dihydro-2H-pyrans in excellent yields.
SINGLET OXYGEN-LABILE LINKERS AND METHODS OF PRODUCTION AND USE THEREOF
申请人:The Board of Regents of the University of Oklahoma
公开号:US20150165026A1
公开(公告)日:2015-06-18
Activatable compositions that include at least one functional moiety and at least one cleavable linker directly or indirectly linked to the at least one functional moiety are disclosed. The at least one functional moiety is inactive when linked to the linker and activated upon cleavage of the linker. Methods of production and use of the activatable composition are also disclosed.