First synthesis of spiro[benzofuran-2,1′-isobenzofuran]-3,3′-dione and its X-ray crystal structure
作者:Roy M. Letcher、Nai-Chiu Kwok、Kung-Kai Cheung
DOI:10.1039/p19920001769
日期:——
The title compound has been synthesised by selenium dioxide oxidation of 2'-carboxy-2-hydroxydeoxybenzoin 3 and its structure has been confirmed spectroscopically and by X-ray crystallography. An earlier report of this compound's synthesis is shown to be erroneous. The synthesis of 3-(2-hydroxyphenyl)isoquinolin-1(2H)-ones from 2'-carboxy-2-hydroxydeoxybenzoin 3 is also described.
Synthesis of novel 5-oxaprotoberberines as bioisosteres of protoberberines
作者:Yifeng Jin、Daulat Bikram Khadka、Su Hui Yang、Chao Zhao、Won-Jea Cho
DOI:10.1016/j.tetlet.2014.01.020
日期:2014.2
5-Oxaprotoberberinones and 5-oxaprotoberberinium were synthesized as bioisosteres of protoberberines. 5-Oxaprotoberberinones were prepared by linking phenol with the isoquinolone ring of 3-phenolisoquinolones by methyleneoxy bridge, while the quaternary 5-oxaprotoberberinium salt was synthesized by reduction and oxidation of the lactam moiety of 5-oxaprotoberberinone.