Composition Containing Siloxane Compound and Phenol Compound
申请人:Ogasawara Kunio
公开号:US20070232821A1
公开(公告)日:2007-10-04
A composition containing 100 parts by mass of a siloxane compound having —HSiRO— (wherein R is a hydrogen atom, a hydrocarbon group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or a phenoxy group) and 0.0001 to 1 part by mass of at least one phenol compound of general formula (1) or (2) as a stabilizer.
wherein a and b are each an integer of 0 to 4; m is 0 or 1; p and q are each 1 or 2; R
1
, R
2
, R
3
, and R
4
are each an alkyl group having 1 to 4 carbon atoms; X
1
and X
2
each represent an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a halogen atom; Y is an alkanediyl group having 1 to 4 carbon atoms; and a plurality of R
1
s, R
2
s, R
3
s, R
4
s, X
1
s, X
2
s or Ys, where present per molecule, may be the same or different.
Convenient Method for the ortho-Formylation of Phenols.
作者:Nini U. Hofsløkken、Lars Skattebøl、Fredrik Johansson、Sophie K. Bertilsson、Pher G. Andersson、Jørgen Møller、Alexander Senning、Xin-Kan Yao、Hong-Gen Wang、J. -P. Tuchagues、Mattias Ögren
DOI:10.3891/acta.chem.scand.53-0258
日期:——
Phenolic derivatives are formylated selectively ortho to the hydroxy group by paraformaldehyde with magnesium dichloride triethylamine as base. With alkyl-substituted phenols excellent yields of the corresponding salicylaldehyde derivatives were obtained. Similar results were obtained with chloro-substituted phenols and with 3-and 4-methoxyphenol while 2-methoxyphenol was unreactive. A good yield of methyl 3-formyl-4-hydroxybenzoate was obtained by this method as well, but generally phenols with electron-attracting groups reacted sluggishly; the long reaction times required caused the formation of by-products. particularly MOM-derivatives of the phenols.
US7737291B2
申请人:——
公开号:US7737291B2
公开(公告)日:2010-06-15
[EN] PHOTOSENSITIVE RESIN COMPOSITION<br/>[FR] COMPOSITION DE RÉSINE PHOTOSENSIBLE<br/>[JA] 感光性樹脂組成物
Reactions of lithium aluminium hydride in hydrocarbon solvents. Selective demethylation of some substituted methyl phenyl ethers
作者:John F. Carroll、Sunanta Kulkowit、M. Anthony McKervey
DOI:10.1039/c39800000507
日期:——
Lithiumaluminiumhydride in benzene or heptane is an effective reagent for selectivedemethylation of methylphenylethers having additional ether functions in the immediate vicinity of the reaction site.