The asymmetric direct Michaeladdition of α,β-unsaturated aldehydes with acetophenone catalyzed by a Jørgensen-Hayashi catalyst in methanol was developed and the corresponding Michael products of δ-keto aldehydes could be afforded in up to 82% yield and 98% ee. asymmetric catalysis - Michaeladditions - ketones - aldehydes - enals
Synthesis, biological evaluation and QSAR studies of diarylpentanoid analogues as potential nitric oxideinhibitors
作者:S. M. Mohd Faudzi、S. W. Leong、F. Abas、M. F. F. Mohd Aluwi、K. Rullah、K. W. Lam、S. Ahmad、C. L. Tham、K. Shaari、N. H. Lajis
DOI:10.1039/c4md00541d
日期:——
A series of forty-five diarylpentadienone analogues were synthesized and were screened for their anti-inflammatory properties. Compound 7d had potent nitric oxide (NO) activity with an IC50 value of 10.24 μM.
Lewis Acid-Mediated Ring-Opening Reactions of <i>trans</i>-2-Aroyl-3-styrylcyclopropane-1,1-dicarboxylates: Access to Cyclopentenes and <i>E</i>,<i>E</i>-1,3-Dienes
作者:Murugesan Thangamani、Kannupal Srinivasan
DOI:10.1021/acs.joc.7b02335
日期:2018.1.19
lopropane-1,1-dicarboxylates was investigated with different Lewis acids. With SnCl4, the cyclopropane dicarboxylates afforded cyclopentene derivatives through ringopening followed by cyclization (vinylcyclopropane–cyclopentene rearrangement). With TiCl4, they furnished E,E-1,3-diene derivatives stereoselectively via ringopening followed by proton elimination.