Diels-Alder reaction of fulvenes with N-(3,5-dichlorophenyl)-maleimide
摘要:
N-(3,5-Dichlorophenyl)-maleimide reacts smoothly with a variety of substituted fulvenes (1) to give only endo adducts (3) independent of the nature of fulvene substituent, Lewis acid catalyst, and reaction solvent and temperature. The structure of the Diets-Alder adduct 3f was determined by X-ray crystallography. Semi-empirical quantum methods (AM1) were used to rationalize the endo stereoselectivity.
Synthesis of Monosubstituted Cyclopentadienyl Ruthenium Complexes from the Reactions of 6-Substituted Fulvenes with RuHCl(PPh<sub>3</sub>)<sub>3</sub>
作者:Sunny Kai San Tse、Tongxun Guo、Herman Ho-Yung Sung、Ian Duncan Williams、Zhenyang Lin、Guochen Jia
DOI:10.1021/om900527v
日期:2009.9.28
Reactions between 6-substitued fulvenes and the hydride complex RuHCl(PPh3)3 are described. Treatment of RuHCl(PPh3)3 with fulvenes without sp3-CH protons at the carbon α to the exocyclic carbon of fulvene produces cleanly monosubstituted cyclopentadienyl ruthenium complexes (η5-C5H4R)RuCl(PPh3)2 via hydride transfer to the electrophilic exocyclic carbon of fulvenes. When fulvenes containing sp3-CH
描述了6-取代的富烯和氢化物配合物RuHCl(PPh 3)3之间的反应。RuHCl的治疗(PPH 3)3与没有SP富烯3个-CH质子在碳α到富烯的环外碳产生干净地单取代的环戊二烯基的钌络合物(η 5 -C 5 H ^ 4 R)的RuCl(PPH 3)2通过氢化转移到富烯的亲电环外碳上。当含有SP富烯3被用来-CH质子在α碳的环外碳,反应产生预期的(η 5 -C 5 H ^由于脱氢,4 R)RuCl(PPh 3)2配合物以及少量的乙烯基环戊二烯基钌配合物。