Synthesis of Polycyclic Isoindoline Derivatives via Tandem Pd-Catalyzed Coupling, Propargyl–Allenyl Isomerization, [4 + 2] Cycloaddition and Aromatization Reaction
作者:Shugao Zhu、Jian Cao、Luling Wu、Xian Huang
DOI:10.1021/jo301437k
日期:2012.11.16
We report in this paper an interesting sequential reaction involving sequential Sonogashira coupling, propargyl–allenyl isomerization, [4 + 2] cycloaddition and aromatization reaction, which provides a facile method for the synthesis of a variety of polycyclic isoindoline derivatives from easily accessible starting materials.
Reversal of regioselectivity in acetylation and deacetylation of aryl-naphthalene diols and diacetates by Amano lipase
作者:Arpita Panja、Deb Ranjan Banerjee、Amit Basak
DOI:10.1039/c4ra10503f
日期:——
upon the nature of the fused heterocyclic ring, namely, dihydrothiophene dioxide (sulfolene), dihydrofuran (phthalan) or dihydro isoindole (indoline). For the isoindole system, the hydrolysis as well as the acetylation occurred at C-7, whereas for the furan derivative, the reaction took place entirely at C-4′. Interestingly, for dihydrothiophene dioxide, reversal of selectivity was observed in hydrolysis