A novel photochemical ring contraction of 4H-pyrans. A new route to selectively substituted cyclobutenes
作者:Diego Armesto、William M. Horspool、Nazario Martin、Ana Ramos、Carlos Seoane
DOI:10.1039/c39870001231
日期:——
The novel photochemical ring contraction of some 4H-pyrans to cyclobutenes is described.
描述了一些新的光化学环收缩约4 H-吡喃成环丁烯。
Synthesis of cyclobutenes by the novel photochemical ring contraction of 4-substituted 2-amino-3,5-dicyano-6-phenyl-4H-pyrans
作者:Diego Armesto、William M. Horspool、Nazario Martin、Ana Ramos、Carlos Seoane
DOI:10.1021/jo00274a021
日期:1989.6
SMETSKAYA, N. I.;MUXINA, N. A.;GRANIK, V. G., XIMIYA GETEROTSIKL. SOEDIN., 1984, N 6, 799-802
作者:SMETSKAYA, N. I.、MUXINA, N. A.、GRANIK, V. G.
DOI:——
日期:——
ARMESTO, DIEGO;HORSPOOL, WILLIAM M.;MARTIN, NAZARIO;RAMOS, ANA;SEOANE, CA+, J. CHEM. SOC. CHEM. COMMUN.,(1987) N 16, 1231-1232
作者:ARMESTO, DIEGO、HORSPOOL, WILLIAM M.、MARTIN, NAZARIO、RAMOS, ANA、SEOANE, CA+
DOI:——
日期:——
ULTRAVIOLET ABSORBENT COMPOSITION
申请人:Furukawa Kazushi
公开号:US20110155976A1
公开(公告)日:2011-06-30
An ultraviolet absorbent composition, having ultraviolet absorbent A and a silicon compound, in which the ultraviolet absorbent A has a maximum absorption wavelength from 350 nm to 400 nm, a half value width of 55 nm or less, and the molar extinction coefficient of 20000 or more at the maximum absorption wavelength.