Palladium-catalyzed <i>ortho</i>-halogen-induced deoxygenative approach of alkyl aryl ketones to 2-vinylbenzoic acids
作者:Shankar Ram、Ajay Kumar Sharma、Arvind Singh Chauhan、Pralay Das
DOI:10.1039/d0cc02941f
日期:——
polymer chemistry and are key precursors for the synthesis of important bioactive molecules. Herein, an ortho-halogen-induced deoxygenative approach for the generation of 2-vinylbenzoic acids from alkylarylketones by palladium catalysis is discovered and explored. This approach requires no base or stoichiometric additives and can be carried out through a simple one-step process. Furthermore, the present
Regioselective Pd-Catalyzed Aerobic Aza-Wacker Cyclization for Preparation of Isoindolinones and Isoquinolin-1(2<i>H</i>)-ones
作者:Guoqiang Yang、Wanbin Zhang
DOI:10.1021/ol203043h
日期:2012.1.6
A switchable regioselective intramolecular aerobic aza-Wacker cyclization catalyzed by palladium is presented. Isolndollnones or isoquinolin1(2H)-ones could be prepared selectively from the same substrates using different catalysts. The type and steric hindrance of the ligands may be the variables most significant for regiocontrol.
Mal, Dipakranjan; Majumdar, Gita; Pal, Ranjan, Journal of the Chemical Society. Perkin transactions I, 1994, # 9, p. 1115 - 1116
作者:Mal, Dipakranjan、Majumdar, Gita、Pal, Ranjan
DOI:——
日期:——
MALI, R. S.;PATIL, S. R.;KULKARNI, B. K.;YEOLA, S. N., INDIAN J. CHEM. B , 29,(1990) N, C. 319-321
作者:MALI, R. S.、PATIL, S. R.、KULKARNI, B. K.、YEOLA, S. N.
DOI:——
日期:——
Stereoselective synthesis of hydroxy stilbenoids and styrenes by atom-efficient olefination with thiophthalides
作者:Prithiba Mitra、Brateen Shome、Saroj Ranjan De、Anindya Sarkar、Dipakranjan Mal
DOI:10.1039/c2ob06991a
日期:——
The synthesis of stilbenoids and styryl carboxylic acids is accomplished with high E-stereoselectivity by olefination of aldehydes with thiophthalides under basic conditions. The olefination is highly atom-efficient as it only loses elemental sulfur during the reaction. This olefination, in conjunction with retro Kolbe–Schmitt reaction, allows facile synthesis of E-hydroxystilbenoids with minimal employment of protecting groups. This study also discloses two important findings: formation of i) 4-methylsulfanyl isocoumarins and ii) an 2-arylindenone.