Substituent directive effects in 1,2-benzodiazepine synthesis via electrocyclic aromatic substitution by the diazo-group: a rearrangement of 9- to 7-substituted 3H-1,2-benzodiazepines
作者:Thomas K. Miller、John T. Sharp、H. Raj Sood、Edward Stefaniuk
DOI:10.1016/s0040-4039(00)74582-5
日期:1980.1
The directive effect of aryl-substituents on the site of ring closure in the electrocyclisation of 1-aryl-3-diazoalkenes has been investigated. At 80°C the product ratio is determined by kinetic control but for some substituents the kinetically favoured 9-substituted 3-1,2-benzodiazepines undergo a new rearrangement to their more stable 7-substituted isomers.
已经研究了芳基取代基在1-芳基-3-重氮烯烃电环化中对闭环位点的指导作用。在80℃下,产物比率通过动力学控制来确定,但是对于某些取代基,在动力学上有利的9-取代的3 -1,2-苯并二氮杂进行新的重排,使其更稳定地成为7-取代的异构体。