FeCl<sub>3</sub>-promoted tandem 1,4-conjugate addition/6-<i>endo-dig</i> cyclization/oxidation of propargylamines and benzoylacetonitriles/malononitriles: direct access to functionalized 2-aryl-4<i>H</i>-chromenes
An efficient and concise procedure has been developed for the synthesis of functionalized 2-aryl-4H-chromenes based on a tandemreaction of propargylamines and benzoylacetonitriles/malononitriles in the presence of FeCl3 as an environmentally friendly promoter. This reaction involves a highlyefficienttandem sequence consisting of 1,4-conjugate addition, 6-endo-dig cyclization, and oxidation. This
Elagamey, Abdel Ghani A.; El-Taweel, Fathy M. A.; Sowellim, Salah Z. A., Collection of Czechoslovak Chemical Communications, 1990, vol. 55, # 2, p. 524 - 534
作者:Elagamey, Abdel Ghani A.、El-Taweel, Fathy M. A.、Sowellim, Salah Z. A.、Sofan, Mamdouh A.、Elnagdi, Mohamed H.
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van Allan,J.A. et al., Journal of Heterocyclic Chemistry, 1970, vol. 7, p. 1363 - 1368
作者:van Allan,J.A. et al.
DOI:——
日期:——
ELAGAMEY, ABDEL GHANI A.;EL-TAWEEL, FATHY M. A.;SOWELLIM, SALAH Z. A.;SOF+, COLLECT. CZECHOSL. CHEM. COMMUN., 55,(1990) N, C. 524-534
作者:ELAGAMEY, ABDEL GHANI A.、EL-TAWEEL, FATHY M. A.、SOWELLIM, SALAH Z. A.、SOF+
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Optical recording material and optical recording medium
申请人:Miyazawa Takashi
公开号:US20070184386A1
公开(公告)日:2007-08-09
The present invention provides a high level optical recording material which is capable of recording and reading by a blue laser with a short wavelength. An optical recording material comprises an organic dye compound A whose absorption maximum wavelength (λmax) is not less than 340 nm and not more than 440 nm and a metal-complex compound B whose absorption maximum wavelength (λmax) is not less than 500 nm and not more than 900 nm, the content of the organic dye compound A is higher than the content of the metal-complex compound B, and light resistance x determined by a predetermined method is not less than 30%.