Zinc-mediated addition of diethyl bromomalonate to alkynes for the cascade reaction towards polysubstituted pyranones and tetracarbonyl derivatives
作者:Anne Miersch、Klaus Harms、Gerhard Hilt
DOI:10.1039/c3cc46788k
日期:——
zinc-mediated regioselective addition reactions of diethylbromomalonate and aromatic and aliphatic alkynes were investigated for the synthesis of vinyl malonates. When the vinyl organo-zinc intermediates were reacted with acid chlorides 2H-pyran-2-ones were obtained while the application of oxalyl chloride and an amine led to tetracarbonyl derivatives in a one-pot multi-step reaction sequence.
Efficient Palladium-Catalyzed Cross-Coupling of β-Chloroalkylidene/arylidene Malonates Using Microwave Chemistry
作者:Rajamohan R. Poondra、Peter M. Fischer、Nicholas J. Turner
DOI:10.1021/jo049132r
日期:2004.10.1
A general method for the synthesis of beta-aryl/alkylarylidene malonates is reported. The key step involves the coupling of an arylboronic acid to a beta-chloroalkyl/arylidene malonate, in the presence of K2CO3 and 1 mol % of the air-stable palladium catalyst (POPd) under microwave irradiation, to afford beta-aryl/alkylarylidene malonates in good yields. The combination of mild reaction conditions, air stable catalyst, microwave-enhanced chemistry, and high levels of functional group compatibility make this an attractive synthetic approach to this class of compounds.
Schulte,K.E. et al., Chemische Berichte, 1972, vol. 105, p. 24 - 33
作者:Schulte,K.E. et al.
DOI:——
日期:——
The palladium(II) induced alkylation of styrenes. Kinetics, stereochemistry, and mechanism
作者:Shunichi Murahashi、Masaaki Yamamura、Nobuaki Mita