An Approach to the Efficient Syntheses of Chiral Phosphino- Carboxylic Acid Esters
作者:Renta Jonathan Chew、Kristel Sepp、Bin-Bin Li、Yongxin Li、Peng-Cheng Zhu、Nguan Soon Tan、Pak-Hing Leung
DOI:10.1002/adsc.201500638
日期:2015.10.12
addition of diarylphosphines with N-enoylbenzotriazoles and analogues is described. Chiral phosphine products are obtained in 100% atom economy and without cumbersome protection–deprotection manipulations. The obtained products can be subsequently transformed to bear various functionalities, including phosphino-carboxylic esters which play critical roles in catalysis and as synthetic aids. Anti-tumour activities
Gas-phase domino cyclization of phosphonium ylides leading to the total synthesis of Eustifoline D
作者:R. Alan Aitken、Lorna Murray
DOI:10.1016/j.tetlet.2017.09.073
日期:2017.11
Six stabilised phosphoniumylides bearing ortho-benzylaminophenyl and cinnamoyl (or a heterocyclic analogue) groups have been prepared and upon flash vacuum pyrolysis at 800 °C were found to undergo cascade cyclization processes to give mainly 3-styrylquinolines but also in some cases ring-fused carbazoles and other fused-ring heterocyclic products. By starting with an appropriate ring-methylated precursor