The rearrangement of 1-ethynyl-2-propenyl pivaloates to cyclopentenones catalyzed by cationic triphenylphosphinegold(I) complexes is described. The reaction tolerates both alkyl and aryl substitution at the acetylenic and olefinic positions. Importantly, the gold(I)-catalyzed rearrangement of enantioenriched propargyl pivaloates proceeds with excellent chirality transfer, thus providing a pract...

I I remember a picture in the air and sunlight style of painting of the nineteenth century. In the foreground was to be seen the back of a horse, the head of which the imagination had to add beyond the frame of the picture ; in the background shone colored splotches which 'one could identify as ladies and gentlemen under a tent . But all that was incidental . The main thing was the bright splot...

how to cite this article: ashrafzadeh f, sadrnabavi a, akhondian j, beiraghi toosi m, mohammadi mh, hassanpour k. angelman syndrome: a case report. iran j child neurol. spring 2016; 10(2):86-89. abstract objective angelman syndrome (as) is a neurodevelopmental disorder presented by jerky movement, speech delay and cognitive disability epilepsy as well as dysmorphic features. it occurs due to an...