Reaction of 4-Iodo-3-(2-iodoaryl)sydnones with Sodium Sulfite and Sodium Borohydride
作者:Nigel N. Chitiyo、Avafia Y. Dossa、Christopher M. Jackson、Lihong Sun、Kenneth Turnbull
DOI:10.1080/00304948.2016.1206436
日期:2016.9.2
demonstrated that the debromination of 4-bromo-3-arylsydnones to 3-arylsydnones may be effected using sodiumborohydride, sodium dithionite or sodium sulfite. More recently, we have extended the utility of the latter reagent to the selective removal of an iodine attached to the C4 carbon of the sydnone ring in the presence of an o-aryl-attached iodine (e. g. 2a to 3a). The present article is a further extension
Debromination of 3-Aryl-4-bromosydnones with Sodium Borohydride
作者:Kenneth Turnbull
DOI:10.1055/s-1986-31606
日期:——
Debromination of 4-bromo-3-(2-substituted aryl) sydnones 1 with sodium borohydride in methanol occurs readily to give good yields of the corresponding parent sydnones 2, except in those cases where the aryl substituent also reacts. The utility of the process for both sydnone purification and the preparation of novel sydnones has been examined briefly.