One-pot synthesis of new iso-DPP derivatives from terminal alkynes and isocyanates
作者:Jonathan Guild、Michael J. Morris、Craig C. Robertson、Alexander W.H. Speed
DOI:10.1016/j.tetlet.2019.151079
日期:2019.9
The reaction of phenyl acetylide anion with aryl isocyanates followed by quenching with water is shown to produce pyrrolopyrrole (iso-DPP) derivatives in addition to the isomeric cyclopentadienone imines previously reported. If the reaction is quenched with dilute HCl, 5-ylidenepyrrol-2(5H)-ones, formed by a Meyer-Schuster rearrangement, can be isolated instead. A possible mechanism for this reaction
One-pot synthesis of 3-arylaminomaleimides from terminal alkynes and isocyanates
作者:Harry Adams、Mark Baker、Hannah Hodson、Michael J. Morris
DOI:10.1016/j.tetlet.2017.03.050
日期:2017.4
of aryl acetylide anions with phenyl isocyanate and subsequent addition of a protonating agent such as ethanol affords good yields of 3-aminomaleimides, formed by the cyclization of one molecule of alkyne with two isocyanates. When the reaction is quenched with water instead, cyclopentadienone imines are formed as the major products.