Copper‐Catalyzed (2+1) Annulation of Acetophenones with Maleimides: Direct Synthesis of Cyclopropanes
作者:Srimanta Manna、Andrey P. Antonchick
DOI:10.1002/anie.201502872
日期:2015.12
A practical copper‐catalyzed direct oxidative cyclopropanation of electron‐deficient alkenes with acetophenone derivatives is reported. The dehydrogenative annulation involves a double CH bond functionalization at the α‐position of the ketone using di‐tert‐butyl peroxide as oxidant. The broad scope of the reaction and excellent functional‐group tolerance is demonstrated for the stereoselective synthesis
AN IMPROVED APPROACH TO<i>N</i>-SUBSTITUTED MALEIMIDES AND PHTHALIMIDES BY MICROWAVE-PROMOTED MITSUNOBU REACTION
作者:Christoph D. Mayer、Marcus Kehrel、Franz Bracher
DOI:10.1080/00304940809458124
日期:2008.12
group for the amino group, are conveniently prepared by reaction of potassium phthalirnide with alkyl halides, in the first step of the Gabriel synthesis." Alternatively, direct N-alkylation of maleimides and phthalimides can be accomplished by the Mitsunobureaction, using alcohols as the alkyl group donors , I 2 The activating agents in the Mitsunobu protocol are triphenylphosphine and azodicar-
RCM Approach to Complex Polycyclic α-Hydroxy γ-Lactams: Synthesis of Indolizinones and Pyrroloazepinones
作者:Asier Gómez-SanJuan、Nuria Sotomayor、Esther Lete
DOI:10.1002/ejoc.201300889
日期:2013.10
The allylmagnesium chloride addition/RCM sequence on N-alkenyl-substituted imides provides a mild access to indolizinone and pyrroloazepinone derivatives with the α-hydroxy-γ-lactam framework. The procedure can be applied to the asymmetric synthesis of this type of derivatives, by employing a 2-exo-hydroxy-10-bornylsulfinyl group as a chiral auxiliary. Further functionality can be introduced at the
Radiation sensitive refractive index changing composition, pattern forming method and optical material
申请人:JSR Corporation
公开号:EP1494072A2
公开(公告)日:2005-01-05
There is provided a radiation sensitive refractive index changing composition containing an inorganic oxide particle, a polymerizable compound, a radiation sensitive decomposer and an escapable compound. The radiation sensitive decomposer decomposes upon exposure to radiation to form an acid, base or radical, and this decomposed product increases the molecular weight of the polymerizable compound.