Metal-free visible-light synthesis of quaternary α-perfluoroalkyl aldehydes <i>via</i> an enamine intermediate
作者:Haruna Matsui、Mao Murase、Tomoko Yajima
DOI:10.1039/c8ob02058b
日期:——
Visible-light induced perfluoroalkylation of the α-position of aldehydes via enamines was developed. The reaction proceeds by electron donor–acceptor complexation of the enamine and perfluoroalkyl iodide without any additional redox catalyst. A variety of perfluoroalkyl groups are tolerated to give various quaternary α-perfluoroalkyl aldehydes. An example using proline-derived chiral amine gives high enantioselectivity
A one-pot procedure for methylenating carbonyl compounds using the Nysted reagent and titanocene dichloride
作者:Adam Haahr、Zoran Rankovic、Richard C. Hartley
DOI:10.1016/j.tetlet.2011.04.017
日期:2011.6
titanocene dichloride methylenates aldehydes and ketones to give alkenes, and in a microwave-assisted process, esters and lactones give enolethers. The methylenating agent in this one-pot procedure is presumed to be titanocene methylidene, which is the same reactive intermediate as that generated from Tebbe, Petasis and Grubbs reagents, each of which have to be prepared before use.
Neue Aminosäurederivate der Formel I
X-(NR¹-HR²-CO)k-Z-(CH₂)m-CO-NR³-CHR⁴-CR⁵-(CHR⁶)n-CO-E-Q-Y
worin
X, Z, E, Q, Y, R¹, R², R³, R⁴, R⁵, R⁶, k, m und n die in Patentanspruch 1 angegebene Bedeutung haben,
sowie ihre Salze hemmen die Aktivität des menschlichen Plasmarenins.
式 I 的新氨基酸衍生物
X-(NR¹-HR²-CO)k-Z-(CH₂)m-CO-NR³-CHR⁴-CR⁵-(CHR⁶)n-CO-E-Q-Y
其中
X、Z、E、Q、Y、R¹、R²、R³、R⁴、R⁵、R⁶、k、m 和 n 具有权利要求 1 所述的含义、
及其盐类可抑制人血浆肾素的活性。
Aminosäurederivate
申请人:MERCK PATENT GmbH
公开号:EP0292800A2
公开(公告)日:1988-11-30
Aminosäurederivate der Formel I
X-V-CHR²-CHOH-Z-(CH₂)a-CO-NR³-CHR⁴-CR⁵-(CHR⁶)n-CO-E-Q-Y I
worin
X, V, Z, E, Q, Y, R², R³, R⁴, R⁵, R⁶, a und n die in verschiedene Bedeutungen haben,
sowie ihre Salze hemmen die Aktivität des menschlichen Plasmarenins.
式 I 的氨基酸衍生物
X-V-CHR²-CHOH-Z-(CH₂)a-CO-NR³-CHR⁴-CR⁵-(CHR⁶)n-CO-E-Q-Y I
其中
X、V、Z、E、Q、Y、R²、R³、R⁴、R⁵、R⁶、a 和 n 具有不同含义、
及其盐类可抑制人血浆肾素的活性。
Peptid-Renininhibitoren
申请人:MERCK PATENT GmbH
公开号:EP0327877A2
公开(公告)日:1989-08-16
Neue Aminosäurederivate der Formel I
R¹-Z-M-NR²-CHR³-CR⁴-(CHR⁵)n-CO-E-Q-Y An⊖ I
worin
R¹, Z, M, R², R³, R⁴, R⁵, n, E, Q, Y und An⊖ die in Patentanspruch 1 angegebene Bedeutung haben,
sowie ihre Salze hemmen die Aktivität des menschlichen Plasmarenins.
式 I 的新氨基酸衍生物
R¹-Z-M-NR²-CHR³-CR⁴-(CHR⁵)n-CO-E-Q-Y An⊖ I
其中
R¹、Z、M、R²、R³、R⁴、R⁵、n、E、Q、Y 和 An⊖ 具有权利要求 1 所述含义、
及其盐类可抑制人血浆肾素的活性。