41652-73-7Relevant articles and documents
Cu(oac)2-promoted cascade carboamination/oxidative cyclization of c-acylimines with alkenes
Dang, Ling,Liang, Libo,Qian, Cheng,Fu, Meiqin,Ma, Tongmei,Xu, Dingguo,Jiang, Huanfeng,Zeng, Wei
, p. 769 - 776 (2014/04/03)
A Cu(OAc)2-promoted cascade carboamination/oxidative cyclization of alkenes with a-imino esters has been explored. This transformation provides a concise approach to rapid assembly of 2-oxo-3-iminopyrrole derivatives in moderate to good yields.
Organosilicon polymers, and dyes, exhibiting nonlinear optical response
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, (2008/06/13)
Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxane, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups.
Lewis Acid-Promoted 3-Aza-Cope Rearrangement of N-Alkyl-N-allylanilines
Beholz, Lars G.,Stille, John R.
, p. 5095 - 5100 (2007/10/02)
The 3-aza-Cope rearrangement of N-alkyl-N-alkylaniline substrates, which required 250 deg C to proceed thermally, was promoted by Lewis acid reagents at 111-140 deg C.Systematic studies of this reaction were performed to examine a number of reaction variables such as concentration, the stoichiometry of the Lewis acid with the substrate, the optimum temperature for rearrangement, and the type of Lewis acid reagent.Of the many Lewis acids investigated, ZnCl2 (140 deg C) and Et2O*BF3 (111 deg C) were the most generally successful reagents for promoting the aromatic 3-aza-Cope rearrangement.With respect to substrate variation, the presence of a methoxy substituent para to the N-allyl group slowed the reaction slightly, while a meta substituent accelerated the rate of rearrangement and produced moderate site selectivity on the aromatic ring.Lewis acid-promoted rearrangement of an unsymmetrically substituted allyl moiety resulted in sigmatropic rearrangement to give the 1-hexen-3-yl substituent on the aromatic ring.Overall, both ZnCl2 and Et2O*BF3 were shown to efficiently accelerate the regiospecific 3-aza-Cope rearrangement of N-alkyl-N-allylanilines for the purpose of forming a carbon-carbon bond between a secondary alkyl substituent and an aromatic ring.