Photochemistry of <i>o</i>-Vinylbenzaldehyde: Formation of a Ketene Methide Intermediate and Its Trapping with Secondary Amines
作者:S. V. Kessar、A. K. S. Mankotia、J. C. Scaiano、M. Barra、J. Gebicki、K. Huben
DOI:10.1021/ja954111n
日期:1996.1.1
shift in the excited state of 1 to give a ketene methide intermediate (7) which becomes trapped with amines. Upon 308 nm laserexcitation of 1 in acetonitrile or benzene solution, a weak transient absorption having λmax at 380 nm was observed. Irradiation of 1 isolated in an argon matrix with 313 nm light also revealed formation of an intermediate with a UV absorption maximum around 380 nm. Its IR spectrum
Photoreactivity of conjugated bichromophoric molecules; photoreaction of o-vinylbenzaldehyde with secondary amines
作者:Satinder Vir Kessar、Anil K. Singh Mankotia、Gurjeet Gujral
DOI:10.1039/c39920000840
日期:——
Irradiation of o-vinylbenzaldehyde 8 in the presence of secondary amines 9 results in N–H addition across the two chromophores to give o-ethylbenzamides 6; photolysis of o-(2-dialkylaminoethyl)benzaldehydes 5a and 5b also affords 6via photoexpulsion followed by recombination of the 8 and 9 which are formed.