Regioselectivity in photocyclization of 2-(N,N-dialkylamino)- and 2-(N-alkylanilino)ethyl benzoylformates via remote proton transfer
作者:Tadashi Hasegawa、Yuko Yamazaki
DOI:10.1016/s0040-4020(98)00766-2
日期:1998.10
2-(N-alkylanilino)ethyl benzoylformates 1 underwent photocyclizationvia ζ-hydrogen transfer to ketone carbonyl oxygen from charge-transfer states to give seven-membered azalactones 2 and/or 2′. The ζ-hydrogen transfer occurred regioselectively. Neither Type II products produced via γ-hydrogen trasnfer nor five-membered aminolactones produced via δ-hydrogen transfer could be detected.
RADIATION CURABLE INKJET FLUIDS AND INKS IMPROVED FOR PHOTOYELLOWING
申请人:Loccufier Johan
公开号:US20100330296A1
公开(公告)日:2010-12-30
A radiation curable inkjet fluid includes a radiation curable composition including at least 25 wt % of a vinylether acrylate and at least 15 wt % of a polymerizable compound including at least three acrylate groups, each wt % being based upon the total weight of the radiation curable composition; and a photoinitiator including a tertiary amine group and 0 to 3 wt % of isopropylthioxanthone based upon the total weight of the radiation curable inkjet fluid. Also, an inkjet printing method using the radiation curable inkjet fluid.
US8227047B2
申请人:——
公开号:US8227047B2
公开(公告)日:2012-07-24
Photochemical reactions of mercapto/amino substituted alkyl phenylglyoxylates induced by intramolecular electron transfer
作者:Shengkui Hu、Douglas C. Neckers
DOI:10.1016/s0040-4020(97)00044-6
日期:1997.2
normal NorrishtypeII cleavage products, the title compounds undergo intermolecular electrontransfer from the heteroatom (sulfur/nitrogen) to the excited carbonyl group, followed by proton transfer and subsequent closing of the resulting biradicals to produce seven-membered (2)/five-membered (11) lactones in high yield. Thiadialkyl phenylglyoxylates (9) react inefficiently due to intramolecular self-quenching