5538-10-3Relevant academic research and scientific papers
Friedel-Crafts ipso-Acylations of 2-Substituted 4-tert-Butylanisoles and p-tert-Butylmethoxymetacyclophanes
Yamato, Takehiko,Maeda, Kenji,Kamimura, Hideo,Noda, Kozo,Tashiro, Masashi
, p. 1865 - 1889 (2007/10/03)
Acylation of 1,n-bis(5-tert-butyl-2-methoxyphenyl)alkanes 6 with acid chloride or acid anhydride in the presence of Lewis acids afforded only the product arizing from two-fold ipso-acylation at the tert-butyl groups; similar reaction of 1,2-bis(5-tert-butyl-2-methoxy-3-methylphenyl)alkanes 8 led only to the recovery of the starting compounds, thus differing from the nitration of 8 with fuming HNO3 at room temperature which affords in quantitative yield the selective ipso-nitration product at the tert-butyl groups.However, the ipso-acylation reactions of 5,13-di-tert-butyl-8,16-dimethoxymeta-cyclophane 15 led to the first-reported direct introduction of an acyl group due to a through-space electronic interaction with the opposing benzene ring.In contrast the selective ipso-acylation reaction was not observed in the case of the larger ring sized macrocyclic meta-cyclophane, p-tert-butyltetramethoxycalix(4)arene.
Synthesis and structure activity relationships of fibrinolytic 1,ω diphenyl 1,ω alkanediamines
Fliedner Jr,Myers,Schor,Pachter
, p. 749 - 754 (2007/10/06)
The promising results obtained in animal clot lysis experiments with the fibrinolytic bis(tetrahydroiso quinolines) VI prompted the preparation of a related series of 1,ω diphenyl 1,ω alkanediamines V. As measured in the standard rat screen (ip) the compo
