32011-91-9Relevant academic research and scientific papers
METHOD FOR PREPARING KETO-FUNCTIONALIZED AROMATIC (METH)ACRYLATES
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Page/Page column 25; 26, (2019/12/15)
The invention relates to a method for preparing keto-functionalized aromatic (meth)acrylates by reacting keto-functionalized aromatic alcohols or keto-functionalized aromatic amines with (meth)acrylic anhydride having a content of (meth)acrylic acetic anhydride of less than 4.5%.
UV/VISIBLE-ABSORBING VINYLIC MONOMERS AND USES THEREOF
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Paragraph 0118, (2017/09/06)
Described herein are UV-absorbing vinylic monomers and their uses in preparing UV-absorbing contact lenses capable of blocking ultra-violet (“UV”) radiation and violet radiation with wavelengths from 380 nm to 440 nm, thereby protecting eyes to some extent from damages caused by UV radiation and potentially from violet radiation.
A novel intramolecular photocyclization of N-(2-bromoalkanoyl) derivatives of 2-acylanilines via 1,8-hydrogen abstraction
Nishio, Takehiko,Koyama, Hiroyuki,Sasaki, Daigo,Sakamoto, Masami
, p. 996 - 1003 (2007/10/03)
The photochemical reactions of different N-(2-acylphenyl)-2-bromo-2- methylpropanamides have been investigated. Irradiation of the N-unsubstituted anilides 1a-1c gave the corresponding dehydrobromination, cyclization, and bromo-migration products 2, 3, and 4, respectively (Table 1). Irradiation of the N-alkyl anilides 1e-1g afforded the corresponding deacylation and cyclization products 5 and 6, respectively, whereas irradiation of the N-alkyl anilides 1i-1k, carrying 2-benzoyl groups on the aromatic rings, afforded the unexpected tricyclic lactams 7 (besides 2, 5, and 6). The formation of the cyclization products 6 could be rationalized in terms of an electrocyclic ring closure of the 6π-electron-conjugated enamides 2 produced by dehydrobromination of 1, followed by thermal 1,5-acyl migration (Path B in the Scheme). The formation of the bridged lactams 7 probably follows a mechanism involving the 1,7-diradical 8 generated by ζ-H-abstraction (1.8-H transfer) by an excited acyl O-atom (Path A).
