College of Chemistry and Molecular Engineering, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University , Zhengzhou 450001, P. R. China.
Org Lett. 2017 Sep 15;19(18):5004-5006. doi: 10.1021/acs.orglett.7b02574. Epub 2017 Sep 1.
1-Phosphafulvenes can be easily generated by dissociation of dimers resulting from the reaction of phospholes with aldimines. As electron-rich partners, they act as 4π phosphadienic systems toward alkenes and alkynes in [4 + 2] cycloaddition reactions. As electron-poor partners, they act either as 2π systems toward conjugated dienes in [2 + 4] cycloaddition reactions via their P═C double bond or as 6π systems toward phosphadienes in [6 + 4] cycloaddition reactions.
1-膦富烯可以通过磷叶立德与亚胺反应生成的二聚体的离解而轻易生成。作为富电子试剂，它们在[4 + 2]环加成反应中充当亲双烯体与烯烃和炔烃反应。作为缺电子试剂，它们或者通过 P═C 双键充当[2 + 4]环加成反应中与共轭二烯的 2π 体系，或者充当[6 + 4]环加成反应中与磷烯的 6π 体系。
