Regiochemical preferences in selenoaldehyde cycloadditions
作者:Peter T. Meinke、Grant A. Krafft
DOI:10.1016/s0040-4039(00)95607-7
日期:——
regiochecnical preferences of substituted selenoaldehydes in cycloaddition reactions with electronically biased dienes have been examined. Selenoaldehydes substituted with electron withdrawing groups exhibit “ortho-para” orientation, while selenoaldehydes substituted with donating or conjugating groups exhibit “meta” orientation. Nitrile oxide dipolar cycloadditions of selenoformaldehyde and selenobenzaldehyde